0.5x=18
x=36
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3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.
3m-5 = 7-21 3m = 7-21+5 3m = -9 m = -3
Solve for x: 3x=(96-75) 96-75= 21 / 21:3= 7
3+4m+5m=214m+5m=21-39m=18m=18/9m=2
9m - 6m = 21 Combine like terms: 3m = 21 Divide both sides by 3: m = 7