Mathematics
tracy75t
10

3x+7=5x-21 Find the value of x

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(2) Answers
Jenny7

Since 5x contains the variable to solve for move it to the left-hand side of the equation by subtracting 5x from both sides. 3x+7−5x=−21 Add 3x and −5x to get −2x. −2x+7=−21 Since 7 does not have the variable to solve for, move it to the right hand side of the equation by subtracting 7 from both sides. −2x=−7−21 Subtract 21 from −7 to get −28. −2x=−28 Divide each term in the equation by −2. x=14 Answer: x=14

monicabaugh

so try to get the x term to one side by itself add 21 to both siede 3x+28=5x subtract 3 x from both sides 28=2x divide 2 14=x

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