SOLUTION: 5a+2=7

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Question 102496This question is from textbook algebra 1
: 5a+2=7 This question is from textbook algebra 1

Found 2 solutions by oberobic, doukungfoo:
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
5a%2B2=7
Subtract 2 from both sides.
5a=5
Divide both sides by 5.
a=1
Check by substituting into the original equation.
5%281%29%2B2=7. True.

Answer by doukungfoo(195) About Me  (Show Source):
You can put this solution on YOUR website!
The objective for solving equations is to get the variable all by itself on one side of the equation. This is done by adding, subtracting, dividing, or multiplying numbers across the equation.
Lets look at the equation we are given:
5a + 2 = 7
First thing to do is subtract 2 from both sides of the equation.
5a + 2 - 2 = 7 - 2
5a + 0 = 5
5a = 5
now to get a by itself we need to divide both sides by 5
5a/5 = 5/5
a = 1
So we have solved for a
We found that a = 1
We can check this by trying it in the original equation.
5a + 2 = 7
5(1) + 2 = 7
5 + 2 = 7
7 = 7