x/3 + y/4 = 6
3x - 4y = 4 NOTA x/3+y/4 =6 todo sobre 12
4x+3y=72
1) 4x+3y=72
3x - 4y = 4
2) y= 72-4x/3
y =4-3x/-4
3) 72-4x/3 =4-3x/-4
-288+16x=12-9x
-288-12= -9x-16x
-300=-25x
-300/-25=x
12=x 3(12) - 4y = 4
36-4y=4
-4y=4-36
-4y=-32 se divide
y=8 x=12,y=8
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Verified answer
x/3 + y/4 = 6
3x - 4y = 4 NOTA x/3+y/4 =6 todo sobre 12
4x+3y=72
1) 4x+3y=72
3x - 4y = 4
2) y= 72-4x/3
y =4-3x/-4
3) 72-4x/3 =4-3x/-4
-288+16x=12-9x
-288-12= -9x-16x
-300=-25x
-300/-25=x
12=x 3(12) - 4y = 4
36-4y=4
-4y=4-36
-4y=-32 se divide
y=8 x=12,y=8