\left \{ {{2x-2y=7} \atop {4x+3y=21}} \right [/tex]
a) {y=-6x+26
{5x=7y+3
b) {5x+9y=-2
{4x-6y=38
c) {5(2x+3)-2(3y-4)=3
{3x+2/4 - y-3/2=5
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a) {y=-6x+26
{5x=7y+3
b) {5x+9y=-2
{4x-6y=38
c) {5(2x+3)-2(3y-4)=3
{3x+2/4 - y-3/2=5