Solve 11x + 7 = −4

The solution of 11x + 7 = −4 is x = -1.

11x + 7 = -4\ \Rightarrow\ x = -1

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The lines y = 11x + 7 and y = -4 meet at x = -1. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

1
The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.
$11x + 7 = -4$
2
Subtract 7 from both sides:
$11x + 7 - 7 = -4 - 7 \ \Rightarrow\ 11x = -11$
3
Divide both sides by 11:
$\frac{11x}{11} = \frac{-11}{11} \ \Rightarrow\ x = -1$
4
Check: put x = -1 back into the equation.
$11\cdot(-1) + 7 = -11 + 7 = -4 \checkmark$

LaTeX source of the formulas on this page

\[ 11x + 7 = -4\ \Rightarrow\ x = -1 \]
\[ 11x + 7 = -4 \]
\[ 11x + 7 - 7 = -4 - 7 \ \Rightarrow\ 11x = -11 \]
\[ \frac{11x}{11} = \frac{-11}{11} \ \Rightarrow\ x = -1 \]
\[ 11\cdot(-1) + 7 = -11 + 7 = -4 \checkmark \]

Trying values of x in 11x + 7 = −4

x	11x + 7	Equals -4?
-3	-26	no
-2	-15	no
-1	-4	yes
0	7	no
1	18	no

Questions

What is x in 11x + 7 = −4?

The solution of 11x + 7 = −4 is x = -1.

How do you solve 11x + 7 = −4?

Subtract 7 from both sides to get 11x = -11, then divide both sides by 11 to get x = -1.

How do I check the answer?

Replace x by -1: 11(-1) + 7 = -4, which is -4.

Solve 11x + 7 = −4

How to work it out

Trying values of x in 11x + 7 = −4

Questions

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