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Solve 7x + 3 = 136

The solution of 7x + 3 = 136 is x = 19.

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The lines y = 7x + 3 and y = 136 meet at x = 19141618202224100120140160180x = 19y = 7x + 3y = 136
The lines y = 7x + 3 and y = 136 meet at x = 19. 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+3=1367x + 3 = 136
  2. 2

    Subtract 3 from both sides:

    7x+3−3=136−3 ⇒ 7x=1337x + 3 - 3 = 136 - 3 \ \Rightarrow\ 7x = 133
  3. 3

    Divide both sides by 7:

    7x7=1337 ⇒ x=19\frac{7x}{7} = \frac{133}{7} \ \Rightarrow\ x = 19
  4. 4

    Check: put x = 19 back into the equation.

    7⋅19+3=133+3=136✓7\cdot19 + 3 = 133 + 3 = 136 \checkmark
LaTeX source of the formulas on this page
\[ 7x + 3 = 136\ \Rightarrow\ x = 19 \]
\[ 7x + 3 = 136 \]
\[ 7x + 3 - 3 = 136 - 3 \ \Rightarrow\ 7x = 133 \]
\[ \frac{7x}{7} = \frac{133}{7} \ \Rightarrow\ x = 19 \]
\[ 7\cdot19 + 3 = 133 + 3 = 136 \checkmark \]

Trying values of x in 7x + 3 = 136

x7x + 3Equals 136?
17122no
18129no
19136yes
20143no
21150no

Questions

What is x in 7x + 3 = 136?

The solution of 7x + 3 = 136 is x = 19.

How do you solve 7x + 3 = 136?

Subtract 3 from both sides to get 7x = 133, then divide both sides by 7 to get x = 19.

How do I check the answer?

Replace x by 19: 7(19) + 3 = 136, which is 136.

Similar equations

    Solve 7x + 3 = 136: x = 19 (steps and check) | WordGPT