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Alekssandra [29.7K]
3 years ago
10

Could someone help me do this using substitution I need to know how to do this for math

Mathematics
2 answers:
klio [65]3 years ago
7 0
X=y-7
x=2-8y
both equal x so
subsitute y-7 for x in other equaton
y-7=2-8y
add 8y
9y-7=2
add 7
9y=9
divide 9
y=1
sub back
x=y-7
x=1-7
x=-6

(x,y)
(-6,1)
mote1985 [20]3 years ago
7 0
Y-7=2-8y
+8y    +8y
___
9y-7=2
    +7  +7
          ____
    9y=8
_______
       9
y=0.88
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