Solve for x and y . 2y-7x=-9 and 4x+6=y
2 answers:
2y-7x=-9
Step1: Add -2y to both sides
-7x+2y+-2y=-9+2y
-7x=-2y-9
Step 2: Divide both sides by -7
-7x/7=-2y-9/7
x= 2/7y+9/7
(this is for the first equation)
2y-7x=-9
4x+6=y
2(4x+6)-7x=-9
8x-7x=-12-9
x=-21
y=4(-21)+6
y=-84+6
y=-78
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