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5x - 7=18 you add the seven to 18 and get 25 then you divide 25 by 5 to get x by itself and you will get 5 x=5
-3x + (-18) = 2x + 7 +18 +18 -3x = 2x +25 -2x -2x -5x = 25 ----- ----- -5 -5 x=-5 *------- equals a division line
the pairs are 1 x 25 5 x 5
2x + 52 = 7 2x + 25 = 7 2x = 7 - 25 2x = -18 x = -18/2 x = -9
25