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Solve 7x + 14 = 84

The solution of 7x + 14 = 84 is x = 10.

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The lines y = 7x + 14 and y = 84 meet at x = 1046810121416406080100120x = 10y = 7x + 14y = 84
The lines y = 7x + 14 and y = 84 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. 1

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

    7x+14=847x + 14 = 84
  2. 2

    Subtract 14 from both sides:

    7x+14−14=84−14 ⇒ 7x=707x + 14 - 14 = 84 - 14 \ \Rightarrow\ 7x = 70
  3. 3

    Divide both sides by 7:

    7x7=707 ⇒ x=10\frac{7x}{7} = \frac{70}{7} \ \Rightarrow\ x = 10
  4. 4

    Check: put x = 10 back into the equation.

    7⋅10+14=70+14=84✓7\cdot10 + 14 = 70 + 14 = 84 \checkmark
LaTeX source of the formulas on this page
\[ 7x + 14 = 84\ \Rightarrow\ x = 10 \]
\[ 7x + 14 = 84 \]
\[ 7x + 14 - 14 = 84 - 14 \ \Rightarrow\ 7x = 70 \]
\[ \frac{7x}{7} = \frac{70}{7} \ \Rightarrow\ x = 10 \]
\[ 7\cdot10 + 14 = 70 + 14 = 84 \checkmark \]

Trying values of x in 7x + 14 = 84

x7x + 14Equals 84?
870no
977no
1084yes
1191no
1298no

Questions

What is x in 7x + 14 = 84?

The solution of 7x + 14 = 84 is x = 10.

How do you solve 7x + 14 = 84?

Subtract 14 from both sides to get 7x = 70, then divide both sides by 7 to get x = 10.

How do I check the answer?

Replace x by 10: 7(10) + 14 = 84, which is 84.

Similar equations

    Solve 7x + 14 = 84: x = 10 (steps and check) | WordGPT