Answer:

Step-by-step explanation:
we have

Remember that

and

substitute

How do you want this to be solved ?
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Answer: 3
Explanation:
x + 7 = 5 x 2
you do 5(2) and get 10
plug in 10 and the equation looks like:
x + 7 = 10
from there you would subtract 7 from 7 and 10 to isolate x and get your answer of:
x = 3 :)
5x+3=3x+7
<em></em>-3 = -3
2x+3=7
-3= -3
2x=4
x=2