Solve 10x + 5 = 25

The solution of 10x + 5 = 25 is x = 2.

10x + 5 = 25\ \Rightarrow\ x = 2

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The lines y = 10x + 5 and y = 25 meet at x = 2. 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.
$10x + 5 = 25$
2
Subtract 5 from both sides:
$10x + 5 - 5 = 25 - 5 \ \Rightarrow\ 10x = 20$
3
Divide both sides by 10:
$\frac{10x}{10} = \frac{20}{10} \ \Rightarrow\ x = 2$
4
Check: put x = 2 back into the equation.
$10\cdot2 + 5 = 20 + 5 = 25 \checkmark$

LaTeX source of the formulas on this page

\[ 10x + 5 = 25\ \Rightarrow\ x = 2 \]
\[ 10x + 5 = 25 \]
\[ 10x + 5 - 5 = 25 - 5 \ \Rightarrow\ 10x = 20 \]
\[ \frac{10x}{10} = \frac{20}{10} \ \Rightarrow\ x = 2 \]
\[ 10\cdot2 + 5 = 20 + 5 = 25 \checkmark \]

Trying values of x in 10x + 5 = 25

x	10x + 5	Equals 25?
0	5	no
1	15	no
2	25	yes
3	35	no
4	45	no

Questions

What is x in 10x + 5 = 25?

The solution of 10x + 5 = 25 is x = 2.

How do you solve 10x + 5 = 25?

Subtract 5 from both sides to get 10x = 20, then divide both sides by 10 to get x = 2.

How do I check the answer?

Replace x by 2: 10(2) + 5 = 25, which is 25.

Solve 10x + 5 = 25

How to work it out

Trying values of x in 10x + 5 = 25

Questions

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