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Solve 8x + 10 = 90

The solution of 8x + 10 = 90 is x = 10.

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The lines y = 8x + 10 and y = 90 meet at x = 1046810121416406080100120140x = 10y = 8x + 10y = 90
The lines y = 8x + 10 and y = 90 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.

    8x+10=908x + 10 = 90
  2. 2

    Subtract 10 from both sides:

    8x+10−10=90−10 ⇒ 8x=808x + 10 - 10 = 90 - 10 \ \Rightarrow\ 8x = 80
  3. 3

    Divide both sides by 8:

    8x8=808 ⇒ x=10\frac{8x}{8} = \frac{80}{8} \ \Rightarrow\ x = 10
  4. 4

    Check: put x = 10 back into the equation.

    8⋅10+10=80+10=90✓8\cdot10 + 10 = 80 + 10 = 90 \checkmark
LaTeX source of the formulas on this page
\[ 8x + 10 = 90\ \Rightarrow\ x = 10 \]
\[ 8x + 10 = 90 \]
\[ 8x + 10 - 10 = 90 - 10 \ \Rightarrow\ 8x = 80 \]
\[ \frac{8x}{8} = \frac{80}{8} \ \Rightarrow\ x = 10 \]
\[ 8\cdot10 + 10 = 80 + 10 = 90 \checkmark \]

Trying values of x in 8x + 10 = 90

x8x + 10Equals 90?
874no
982no
1090yes
1198no
12106no

Questions

What is x in 8x + 10 = 90?

The solution of 8x + 10 = 90 is x = 10.

How do you solve 8x + 10 = 90?

Subtract 10 from both sides to get 8x = 80, then divide both sides by 8 to get x = 10.

How do I check the answer?

Replace x by 10: 8(10) + 10 = 90, which is 90.

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    Solve 8x + 10 = 90: x = 10 (steps and check) | WordGPT