0
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7+x=15
x=8
If 40 plus x equals 25 then x is equal to -15.
x - 7 = 8 x = 7 + 8 x = 15
15
3x+7=37 -7 -7 3x=30 /3 /3 x=10
if 3x+5=x+19 then x=7
x = -7
2
X=7
x = 27
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
-1
7
x=2 1/7
8.5x + 8 = 1.3x + 15 7.2x = 7 x = 0.972222(repeating)
4x+7-3x = 15 4x-3x = 15-7 x = 8
Move the numerals to the right hand side: x = 15 - 7 - 2 ie x = 6