3x = 70
x = 70/3 or 23 and 1/3
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3x+130+65 = 360 3x+195 = 360 3x = 360-195 3x = 165 x = 55
3x-5=3x+5 There is no solution.
fx=3x-5 f=(3x-5)/x f2=(6x-10)/x /=divide
-3x + 5 = 20 -3x = 15 x = -5
4x + 5 = 3x + 84x-3x + 5 - 5 = 3x - 3x + 8 -5x = 3