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Solve 7x + 4 = 88

The solution of 7x + 4 = 88 is x = 12.

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The lines y = 7x + 4 and y = 88 meet at x = 12681012141618406080100120x = 12y = 7x + 4y = 88
The lines y = 7x + 4 and y = 88 meet at x = 12. 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+4=887x + 4 = 88
  2. 2

    Subtract 4 from both sides:

    7x+4−4=88−4 ⇒ 7x=847x + 4 - 4 = 88 - 4 \ \Rightarrow\ 7x = 84
  3. 3

    Divide both sides by 7:

    7x7=847 ⇒ x=12\frac{7x}{7} = \frac{84}{7} \ \Rightarrow\ x = 12
  4. 4

    Check: put x = 12 back into the equation.

    7⋅12+4=84+4=88✓7\cdot12 + 4 = 84 + 4 = 88 \checkmark
LaTeX source of the formulas on this page
\[ 7x + 4 = 88\ \Rightarrow\ x = 12 \]
\[ 7x + 4 = 88 \]
\[ 7x + 4 - 4 = 88 - 4 \ \Rightarrow\ 7x = 84 \]
\[ \frac{7x}{7} = \frac{84}{7} \ \Rightarrow\ x = 12 \]
\[ 7\cdot12 + 4 = 84 + 4 = 88 \checkmark \]

Trying values of x in 7x + 4 = 88

x7x + 4Equals 88?
1074no
1181no
1288yes
1395no
14102no

Questions

What is x in 7x + 4 = 88?

The solution of 7x + 4 = 88 is x = 12.

How do you solve 7x + 4 = 88?

Subtract 4 from both sides to get 7x = 84, then divide both sides by 7 to get x = 12.

How do I check the answer?

Replace x by 12: 7(12) + 4 = 88, which is 88.

Similar equations

    Solve 7x + 4 = 88: x = 12 (steps and check) | WordGPT