Question

Given g(x) = 2x + 1, solve for x when g(x) = 7.

I hate algebra and really don’t get it so plz help

Answer 1

x=3

Explanation:

g(x)=7

7=2x+1

subtract 1 on both sides

6=2x

divide by 2 on both sides

x=3

Answer 2

x=3

Explanation:

7

=

2

+

1

7=2x+1

7=2x+1

Solve

1

Subtract

1

1

1

from both sides of the equation

7

=

2

+

1

7=2x+1

7=2x+1

7

−

1

=

2

+

1

−

1

7{\color{#c92786}{-1}}=2x+1{\color{#c92786}{-1}}

7−1=2x+1−1

2

Simplify

3

Divide both sides of the equation by the same term

4

Simplify

Solution

3

=