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Solve 7x + 7 = 70

The solution of 7x + 7 = 70 is x = 9.

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The lines y = 7x + 7 and y = 70 meet at x = 946810121420406080100120x = 9y = 7x + 7y = 70
The lines y = 7x + 7 and y = 70 meet at x = 9. 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+7=707x + 7 = 70
  2. 2

    Subtract 7 from both sides:

    7x+7−7=70−7 ⇒ 7x=637x + 7 - 7 = 70 - 7 \ \Rightarrow\ 7x = 63
  3. 3

    Divide both sides by 7:

    7x7=637 ⇒ x=9\frac{7x}{7} = \frac{63}{7} \ \Rightarrow\ x = 9
  4. 4

    Check: put x = 9 back into the equation.

    7⋅9+7=63+7=70✓7\cdot9 + 7 = 63 + 7 = 70 \checkmark
LaTeX source of the formulas on this page
\[ 7x + 7 = 70\ \Rightarrow\ x = 9 \]
\[ 7x + 7 = 70 \]
\[ 7x + 7 - 7 = 70 - 7 \ \Rightarrow\ 7x = 63 \]
\[ \frac{7x}{7} = \frac{63}{7} \ \Rightarrow\ x = 9 \]
\[ 7\cdot9 + 7 = 63 + 7 = 70 \checkmark \]

Trying values of x in 7x + 7 = 70

x7x + 7Equals 70?
756no
863no
970yes
1077no
1184no

Questions

What is x in 7x + 7 = 70?

The solution of 7x + 7 = 70 is x = 9.

How do you solve 7x + 7 = 70?

Subtract 7 from both sides to get 7x = 63, then divide both sides by 7 to get x = 9.

How do I check the answer?

Replace x by 9: 7(9) + 7 = 70, which is 70.

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    Solve 7x + 7 = 70: x = 9 (steps and check) | WordGPT