Solve 7x + 3 = −46

The solution of 7x + 3 = −46 is x = -7.

7x + 3 = -46\ \Rightarrow\ x = -7

Explain it step by step in chat Make a short video of it

The lines y = 7x + 3 and y = -46 meet at x = -7. 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.
$7x + 3 = -46$
2
Subtract 3 from both sides:
$7x + 3 - 3 = -46 - 3 \ \Rightarrow\ 7x = -49$
3
Divide both sides by 7:
$\frac{7x}{7} = \frac{-49}{7} \ \Rightarrow\ x = -7$
4
Check: put x = -7 back into the equation.
$7\cdot(-7) + 3 = -49 + 3 = -46 \checkmark$

LaTeX source of the formulas on this page

\[ 7x + 3 = -46\ \Rightarrow\ x = -7 \]
\[ 7x + 3 = -46 \]
\[ 7x + 3 - 3 = -46 - 3 \ \Rightarrow\ 7x = -49 \]
\[ \frac{7x}{7} = \frac{-49}{7} \ \Rightarrow\ x = -7 \]
\[ 7\cdot(-7) + 3 = -49 + 3 = -46 \checkmark \]

Trying values of x in 7x + 3 = −46

x	7x + 3	Equals -46?
-9	-60	no
-8	-53	no
-7	-46	yes
-6	-39	no
-5	-32	no

Questions

What is x in 7x + 3 = −46?

The solution of 7x + 3 = −46 is x = -7.

How do you solve 7x + 3 = −46?

Subtract 3 from both sides to get 7x = -49, then divide both sides by 7 to get x = -7.

How do I check the answer?

Replace x by -7: 7(-7) + 3 = -46, which is -46.

Solve 7x + 3 = −46

How to work it out

Trying values of x in 7x + 3 = −46

Questions

Similar equations