5x + 3 = 4x
Subtract 3 from each side:
5x = 4x - 3
Subtract 4x from each side:
x = -3
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4x - 10 + 5x = 719x = 81x = 9
9x = 60x = 60/9 = 6 2/3 (or 6.67)
5x+12 = 4x-88 x = -100
4x-3+2x-x = 10 Collect the like terms; 5x-3 = 10 5x = 13 x = 13/5
5x - 18 = 4x + 7Add 18 to each side:5x = 4x + 25Subtract 4x from each side:x = 25