If you mean: 3+5x+7 = 70 then the value of x is 12
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5x + 3 = 4xSubtract 3 from each side:5x = 4x - 3Subtract 4x from each side:x = -3
5x+3+x=24 6x+3=24 6x=21 x=3.5
x2+5x+6 = (x+2)(x+3) when factored because 2 and 3 are factors of 6
3x + 2x = 5x
6x + 3 = -7 -5x 6x + 5x = -7 -3 11x = -10 x = -10/11