439,877 views
21 votes
21 votes
PLEASE HELP
PLEASE SHOW HOW U CHECKED UR WORK

PLEASE HELP PLEASE SHOW HOW U CHECKED UR WORK-example-1
User Sanchi Girotra
by
2.5k points

2 Answers

17 votes
17 votes

Answer:

x = 5

Explanation:

3(x + 7) + 4 = 40 ( subtract 4 from both sides )

3(x + 7) = 36 ( divide both sides by 3 )

x + 7 = 12 ( subtract 7 from both sides )

x = 5

As a check

substitute x = 5 into the left side of the equation and if the value obtained is equal to the right side (40) then it is a solution

3(5 + 7) + 4

= 3(12) + 4

= 36 + 4

= 40

left side = right side

then x = 5 is the solution to the equation

User Watts Epherson
by
2.9k points
10 votes
10 votes
3(x+7)+4=40
3x+21+4=40
3x+25=40
-25 -25
3x=15
Divide by 3.
x=5

Hope this helps.
User Blobdon
by
2.5k points