I.- Sistemas de 1er. grado con dos incógnitas

901.902.
\large 5x-\; y=3
\large 2x+3y=8
\large 3x+5y=31
\large 4x-\; y=26
903.904.
\large 11x-10y=14
\large \; 5x+\; \; 7y=41
\large 5x-3y=14
\large 7x+6y=40
905.906.
\large \; 5x+\; 7z=43
\large 11x+9z=69
\large 8x+21z=33
\large 6x+35x=177
907.908.
\large 13x-9y=17
\large 11x-15y=7
\large 5x+2y=33
\large 7x=63
909.910.
\large x+5y=13
\large x-\; y=\; 7
\large 3x+2y=33
\large 7x+\; y=44
911.912.
\large \; x+y=19
\large 2x-y=2
\large 5x-6y=\; 2
\large 7x-2y=54
913.914.
\large 2x+y=\; 10
\large \; x-y=-1
\large 3x-\; y=1
\large 2x+3y=8
915.916.
\large 2x+25=3y
\large 4x-\; y=25
\large 5x+3y=58
\large 3x+5y=54
917.918.
\large 12x-7y=71
\large 15x-9y=87
\large 4x+12y=28
\large 5x-\; 3y=-1
919.920.
\large 3x+5y=20
\large 7x+4y=39
\large 7x-3y=-8
\large 5x-3y=50
921.922.
\large 6(x-3)=7y
\large 2x-y=30
\large 3(x+2)=10y
\large 5x-31=3y
923.924.
\large 5x+2y=79
\large 3(x+5)=4y
\large 3x+5y=20
\large 2(x-5y)=0
925.926.
\large 5x=4(y+1)
\large 21=3(2x-y)
\large 3(8x-23)=-7y
\large 21=7(9x-5y)
927.928.
\large x=2(11-y)
\large y-3=5(x-5)
\large x+3y=10(x+6)
\large x-1=y-9x
929.
\large 3(2x-y+5)=7,50(x+1)
\large x+5y=2x+4,50y
930.
\large 4x-y=3(x-2+y)
\large 18x+15y=2(x-2y-6,50)
931.932.
\large x+y=12
\large \frac{x}{2}+\frac{y}{3}=8
\large x+2y=20
\large 3x-\frac{y}{4}=10
933.934.
\large \frac{2x}{5}+\frac{3y}{4}=5
\large x-y=1
\large \frac{3x}{8}-\frac{2y}{5}=5
\large \frac{x}{2}+3y=95
935.936.
\large 2x+3y=\frac{43}{12}
\large \frac{x}{2}+\frac{y}{3}=\frac{7}{12}
\large \frac{x}{7}+\frac{y}{6}=10
\large x-y=44
937.938.
\large 4x-3y=24
\large \frac{x}{5}=\frac{y}{4}
\large \frac{x}{3}-\frac{y}{2}=4
\large 2x+2y=44
939.940.
\large \frac{x}{y}=\frac{3}{4}
\large 5x-4y=-3
\large 3x-2y=12
\large \frac{5x}{8}+\frac{2y}{3}=9
941.942.
\large \frac{x}{7}+\frac{y}{9}=\frac{22}{21}
\large \frac{x}{8}-\frac{y}{12}=\frac{3}{8}
\large 2x=3y
\large \frac{2x}{3}=\frac{4y}{5}+2
943.944.
\large 3x+\frac{7y}{9}=19
\large y-6=\frac{3x}{4}
\large 5x+\frac{y}{5}=23
\large 5y-\frac{31x}{4}=44
945.
\large \frac{x}{2}+\frac{y}{3}=10
\large \frac{5x}{7}-\frac{2y}{9}=8
946.
\large \frac{x+y}{2}-\frac{x-y}{3}=11
\large x=\frac{2y}{5}+12
947.948.
\large \frac{x+1}{y}=\frac{1}{4}
\large \frac{x}{y+1}=\frac{1}{5}
\large \frac{2x}{3}-\frac{5y}{4}=-3
\large \frac{x+y}{x-y}=-7
949.
\large 5(x-y)=4x-1
\large \frac{7}{2}(x-2y-3)=\frac{1}{4}(15x+8y)
950.
\large \frac{4x+7}{y}=29
\large \frac{5x}{2x-3y}=3+\frac{7}{31}

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