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myrzilka [38]
3 years ago
7

What is the value of y when x equals 4 in the equation -3x+9y=-57?

Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
8 0
So what you would do is put in the 4 where ever you see an x. so it would look like -3(4)+9y=-57 then you solve for y. and the answer is -5. Make sense?

zzz [600]3 years ago
6 0
-3(4) +9Y=-57
12+9y=-57
9y=-57+12
9y=-45
y=-5
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