-3x + 9y=-57 x=4 what is the answer
2 answers:
-3x+9y=-57 for x=4
-3(4)+9y=-57
Simplify both sides of the equation
(-3)(4)+9y=-57
-12+9y=-57
9y-12=-57
Add 12 to both sides
9y-12+12=-57+12
9y=-45
Divide both sides by 9
9y/9=-45/9
y=-5
I hope that's help !
X=4
sub
-3(4)+9y=-57
-12+9y=-57
add 12 both sides
9y=-45
divide 9
y=-5
(4,-5)
y=5
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