Solve each equation. 1. 9/2x+18+3x=11/2 2. (x+6)-(2x=7)-3x=-9

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asked Dec 26, 2015 78.0k views

4 votes

Solve each equation.
1. 9/2x+18+3x=11/2
2. (x+6)-(2x=7)-3x=-9

Mathematics
middle-school

Svelandiag asked

by Svelandiag

7.6k points

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1 Answer

2 votes

$1.\\(9)/(2)x+18+3x=(11)/(2)\ \ \ \ \ |Multiply\ by\ 2\\\\ 9x+36+6x=11\\\\ 15x+36=11\ \ \ |Subtract\ 36\\\\ 15x=-25\ \ \ |Divide\ by\ 15\\\\ x=-1(2)/(5)\\\\ 2.\\ (x+6)-(2x-7)-3x=-9\\\\ x+6-2x+7-3x=-9\\\\ -4x+13=-9\ \ \ |Subtract\ 13\\\\ -4x=-22\ \ \ |Divide\ by\ -4\\\\ x=5,5$