Question 356499
-5y=(34-x).....(1) OK so far.
y=-(34-x)/5
=(x-34)/5 is what you should have done. you substituted 34-x for y, but -5y=34-x, not y.
You could have solved the problem by substituting for y but you have an unwieldy
fraction to substitute.
Much better is to substitute for x:
x-5y=34 (1)
x=5y+34
3x+4y=-12
3(5y+34)+4y=-12
15y+102+4y=-12
19y=-114
y=-6
x=4
.
Keep up the struggle. You WILL get it.
.
Ed