3X + 6 = 21
subtract 6 from each side
3X = 15
divide both sides integers by 3
X = 5
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3(5) + 6 = 21
15 + 6 = 21
21 = 21
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3x + 2 = 3x + 6 This is not possible.
x = 15 as 4*15+6 = 66 3*15+21 = 66 or an easier way to do it 4x - 3x = 1x 21 - 6 = 15 1x = 15
what is a slope
3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.
x=6