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Solve 7x + 13 = 34

The solution of 7x + 13 = 34 is x = 3.

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The lines y = 7x + 13 and y = 34 meet at x = 3-2246820406080x = 3y = 7x + 13y = 34
The lines y = 7x + 13 and y = 34 meet at x = 3. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

  1. 1

    The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.

    7x+13=347x + 13 = 34
  2. 2

    Subtract 13 from both sides:

    7x+13−13=34−13 ⇒ 7x=217x + 13 - 13 = 34 - 13 \ \Rightarrow\ 7x = 21
  3. 3

    Divide both sides by 7:

    7x7=217 ⇒ x=3\frac{7x}{7} = \frac{21}{7} \ \Rightarrow\ x = 3
  4. 4

    Check: put x = 3 back into the equation.

    7⋅3+13=21+13=34✓7\cdot3 + 13 = 21 + 13 = 34 \checkmark
LaTeX source of the formulas on this page
\[ 7x + 13 = 34\ \Rightarrow\ x = 3 \]
\[ 7x + 13 = 34 \]
\[ 7x + 13 - 13 = 34 - 13 \ \Rightarrow\ 7x = 21 \]
\[ \frac{7x}{7} = \frac{21}{7} \ \Rightarrow\ x = 3 \]
\[ 7\cdot3 + 13 = 21 + 13 = 34 \checkmark \]

Trying values of x in 7x + 13 = 34

x7x + 13Equals 34?
120no
227no
334yes
441no
548no

Questions

What is x in 7x + 13 = 34?

The solution of 7x + 13 = 34 is x = 3.

How do you solve 7x + 13 = 34?

Subtract 13 from both sides to get 7x = 21, then divide both sides by 7 to get x = 3.

How do I check the answer?

Replace x by 3: 7(3) + 13 = 34, which is 34.

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    Solve 7x + 13 = 34: x = 3 (steps and check) | WordGPT