150=25x. so you have to isolate the variable, x, by doing the opposite operation of multiplication, which is division. Divide 25 by 25, you cancel out, making you divide 150 by 25, your answer being 7. You could also count like quarters, 25 cents each.
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X (x - 25) So X = 0 Or X = +25
32 + x = 259 + x = 25x = 25 - 9x = 16
Using algebra to solve this problem (12 + .25x = 30), the answer (x) is 72.
25x + 75 = 25*(x + 3)
25x = 11 so x = 0.44