Solve 2x + 7 = 35

The solution of 2x + 7 = 35 is x = 14.

2x + 7 = 35\ \Rightarrow\ x = 14

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The lines y = 2x + 7 and y = 35 meet at x = 14. 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.
$2x + 7 = 35$
2
Subtract 7 from both sides:
$2x + 7 - 7 = 35 - 7 \ \Rightarrow\ 2x = 28$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{28}{2} \ \Rightarrow\ x = 14$
4
Check: put x = 14 back into the equation.
$2\cdot14 + 7 = 28 + 7 = 35 \checkmark$

LaTeX source of the formulas on this page

\[ 2x + 7 = 35\ \Rightarrow\ x = 14 \]
\[ 2x + 7 = 35 \]
\[ 2x + 7 - 7 = 35 - 7 \ \Rightarrow\ 2x = 28 \]
\[ \frac{2x}{2} = \frac{28}{2} \ \Rightarrow\ x = 14 \]
\[ 2\cdot14 + 7 = 28 + 7 = 35 \checkmark \]

Trying values of x in 2x + 7 = 35

x	2x + 7	Equals 35?
12	31	no
13	33	no
14	35	yes
15	37	no
16	39	no

Questions

What is x in 2x + 7 = 35?

The solution of 2x + 7 = 35 is x = 14.

How do you solve 2x + 7 = 35?

Subtract 7 from both sides to get 2x = 28, then divide both sides by 2 to get x = 14.

How do I check the answer?

Replace x by 14: 2(14) + 7 = 35, which is 35.

Solve 2x + 7 = 35

How to work it out

Trying values of x in 2x + 7 = 35

Questions

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