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Anonymous
19 (7 + 12 = 4x - 3x)
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In the equation 3x plus 7 equals 13, x is equal to 2.
4x + 5 = 3x + 84x-3x + 5 - 5 = 3x - 3x + 8 -5x = 3
7.5
x = -11
Ten. That means 3x equals 30, and 30 divided by three is ten.