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It is a linear equation in one variable, u.
The solution can be obtained if you divide both sides by 4:
thus 4u/4 = -12/4 that is u = -3
U=2.
7 + 4u = 70 - 3u[add 3u to both sides]7 + 4u + 3u = 70 - 3u + 3u7 + 7u = 70 + 07 + 7u = 707u = 70 - 77u = 63u = 9
48 divided by 12 equals 4. 48/12 = 4
The answer is "FALSE".
Well, if 3x equals 12, then x equals 4. And if y equals 3x, then y equals 3 times 4, which is 12. So, y equals 12. Math can be a piece of cake when you break it down like that!