13x + 7
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3x plus 10x - 7With out knowing what ' x ' actually is.. it will reduce down to.3x + 10 x - 7=13x - 7
-3x + 10x = 7x3x + 3x = 6x
3x + 12 + 10x = 13x + 12
3x - 7 = 5x + 133x - 5x = 13 + 7-2x = 20x = -10x=-3
First, subtract 3x from each side of the equation. Then, divide each side of the equation by 7 .