Solve 2x + 15 = 35

The solution of 2x + 15 = 35 is x = 10.

2x + 15 = 35\ \Rightarrow\ x = 10

Explain it step by step in chat Make a short video of it

The lines y = 2x + 15 and y = 35 meet at x = 10. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

1
The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.
$2x + 15 = 35$
2
Subtract 15 from both sides:
$2x + 15 - 15 = 35 - 15 \ \Rightarrow\ 2x = 20$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{20}{2} \ \Rightarrow\ x = 10$
4
Check: put x = 10 back into the equation.
$2\cdot10 + 15 = 20 + 15 = 35 \checkmark$

LaTeX source of the formulas on this page

\[ 2x + 15 = 35\ \Rightarrow\ x = 10 \]
\[ 2x + 15 = 35 \]
\[ 2x + 15 - 15 = 35 - 15 \ \Rightarrow\ 2x = 20 \]
\[ \frac{2x}{2} = \frac{20}{2} \ \Rightarrow\ x = 10 \]
\[ 2\cdot10 + 15 = 20 + 15 = 35 \checkmark \]

Trying values of x in 2x + 15 = 35

x	2x + 15	Equals 35?
8	31	no
9	33	no
10	35	yes
11	37	no
12	39	no

Questions

What is x in 2x + 15 = 35?

The solution of 2x + 15 = 35 is x = 10.

How do you solve 2x + 15 = 35?

Subtract 15 from both sides to get 2x = 20, then divide both sides by 2 to get x = 10.

How do I check the answer?

Replace x by 10: 2(10) + 15 = 35, which is 35.

Solve 2x + 15 = 35

How to work it out

Trying values of x in 2x + 15 = 35

Questions

Similar equations