-7x = -42
7x = 42
x = 6
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X=10 how to get it: 5x-8=42 <--- add 8 to each side this will cancle out -8 leaving you with 5x=50 5x=50 <------ divide each side by 5, this will cancel out 5 and leaves x=10 x= 10
17 = 7 + 8ySubtract 7 from both sides:10 = 8yDivide both sides by 8:10/8 = ySimplify:y = 5/4 or y = 1.25
Multiply by 10...
17 days and 17 hours minus 8 days and 7 hours equals 9 days and 10 hours.
Negative 17 plus 121 divided by 8 equals 13.