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Solve 4x + 10 = 90

The solution of 4x + 10 = 90 is x = 20.

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The lines y = 4x + 10 and y = 90 meet at x = 2014161820222426708090100110x = 20y = 4x + 10y = 90
The lines y = 4x + 10 and y = 90 meet at x = 20. 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.

    4x+10=904x + 10 = 90
  2. 2

    Subtract 10 from both sides:

    4x+10−10=90−10 ⇒ 4x=804x + 10 - 10 = 90 - 10 \ \Rightarrow\ 4x = 80
  3. 3

    Divide both sides by 4:

    4x4=804 ⇒ x=20\frac{4x}{4} = \frac{80}{4} \ \Rightarrow\ x = 20
  4. 4

    Check: put x = 20 back into the equation.

    4⋅20+10=80+10=90✓4\cdot20 + 10 = 80 + 10 = 90 \checkmark
LaTeX source of the formulas on this page
\[ 4x + 10 = 90\ \Rightarrow\ x = 20 \]
\[ 4x + 10 = 90 \]
\[ 4x + 10 - 10 = 90 - 10 \ \Rightarrow\ 4x = 80 \]
\[ \frac{4x}{4} = \frac{80}{4} \ \Rightarrow\ x = 20 \]
\[ 4\cdot20 + 10 = 80 + 10 = 90 \checkmark \]

Trying values of x in 4x + 10 = 90

x4x + 10Equals 90?
1882no
1986no
2090yes
2194no
2298no

Questions

What is x in 4x + 10 = 90?

The solution of 4x + 10 = 90 is x = 20.

How do you solve 4x + 10 = 90?

Subtract 10 from both sides to get 4x = 80, then divide both sides by 4 to get x = 20.

How do I check the answer?

Replace x by 20: 4(20) + 10 = 90, which is 90.

Similar equations

    Solve 4x + 10 = 90: x = 20 (steps and check) | WordGPT