Solve 10x − 5 = 195

The solution of 10x − 5 = 195 is x = 20.

10x - 5 = 195\ \Rightarrow\ x = 20

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The lines y = 10x − 5 and y = 195 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
The goal is to get x alone. Undo the operations in the opposite order: first the subtraction, then the multiplication.
$10x - 5 = 195$
2
Add 5 to both sides:
$10x - 5 + 5 = 195 + 5 \ \Rightarrow\ 10x = 200$
3
Divide both sides by 10:
$\frac{10x}{10} = \frac{200}{10} \ \Rightarrow\ x = 20$
4
Check: put x = 20 back into the equation.
$10\cdot20 - 5 = 200 - 5 = 195 \checkmark$

LaTeX source of the formulas on this page

\[ 10x - 5 = 195\ \Rightarrow\ x = 20 \]
\[ 10x - 5 = 195 \]
\[ 10x - 5 + 5 = 195 + 5 \ \Rightarrow\ 10x = 200 \]
\[ \frac{10x}{10} = \frac{200}{10} \ \Rightarrow\ x = 20 \]
\[ 10\cdot20 - 5 = 200 - 5 = 195 \checkmark \]

Trying values of x in 10x − 5 = 195

x	10x − 5	Equals 195?
18	175	no
19	185	no
20	195	yes
21	205	no
22	215	no

Questions

What is x in 10x − 5 = 195?

The solution of 10x − 5 = 195 is x = 20.

How do you solve 10x − 5 = 195?

Add 5 to both sides to get 10x = 200, then divide both sides by 10 to get x = 20.

How do I check the answer?

Replace x by 20: 10(20) − 5 = 195, which is 195.

Solve 10x − 5 = 195

How to work it out

Trying values of x in 10x − 5 = 195

Questions

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