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Alexxandr [17]
3 years ago
9

Find the value of y when x equals 4, -3x+9y=-57

Mathematics
2 answers:
Ivenika [448]3 years ago
4 0
-12 + 9y = -57

add 12 to both sides, 9y = -45

divide 9 from both sides to isolate the y

y = -5
adoni [48]3 years ago
3 0
-3(4)+9y=-57
-12+9y=-57
9y=-45
y=-5
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