How do you solve #15x - 7= 3+ 13x#?

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Answer 1 · 2017-06-21T14:56:52

x = 5

We need to get the variable on one side only and isolate the x.

1. Subtract #13x# from both sides of the equation.

#15x - 7 - color(blue)(13x) = 3 cancel(+13x) cancel(color(blue)(- 13x)) #

#2x - 7 = 3#

2. Add 7 to both sides.

#2x cancel(- 7) cancel(+ color(blue)(7)) = 3 color(blue)(+7)#

#2x = 10#

3. Divide both sides by 2.

#(2x)/2 = 10/2#

#x = 5#