Whats 7+3x=5x+13?????

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asked Oct 4, 2015 125k views

5 votes

Whats 7+3x=5x+13?????

Mathematics
middle-school

Zahanm asked

by Zahanm

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$7+3x=5x+13\\ 7+3x-3x=5x+13-3x\\ 7=2x+13\\ 7-13=2x+13-13\\ -6=2x\\ (-6)/(2) =(2x)/(2)\\ -3=x$

Ggupta answered Oct 6, 2015

by Ggupta

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4 votes

7 + 3x = 13 + 5x

Add 5x to both side

7 + 3x + -5x = 13 + 5x + -5x

This two is 0
5x + -5x = 0

Add seven on both sides
7 + -7 + -2x = 13 + -7

3 + -7 = 6

x = -3

J M answered Oct 9, 2015

by J M

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