7 plus 2 is 9. 9 plus 8 is 17. 17 plus 3 is 20.
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Solve for x. 3x + 3 = x + 7 2x + 3 = 7 2x = 4 x = 2 Check it. 6 + 3 = 2 + 7 It checks.
n= -2
2x+3 = 7 2x = 7-3 2x = 4 x = 2
(7)-(-3)+(16)-(8) = 18
5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5