Four times a certain number is equal to the number subtracted from 40 find the number

Step 1: Define the variable. Let the certain number be x. Step 2: Translate the problem into an equation. "Four times a certain number" can be written as 4x. "The number subtracted from 40" means 40 − x. "is equal to" means =. So, the equation is: 4x = 40 − x Step 3: Solve the equation for x. Add x to both sides of the equation: 4x + x = 40 − x + x; 5x = 40 Step 4: Isolate x. Divide both sides by 5: 5x / 5 = 40 / 5; x = 8 The number is 8.

Four times a certain number is equal to the number subtracted from 40 find the number

Step 1: Define the variable. Let the certain number be x. Step 2: Translate the problem into an equation. "Four times a certain number" can be written as 4x. "The number subtracted from 40" means 40 − x. "is equal to" means =. So, the equation is: 4x = 40 − x Step 3: Solve the equation for x. Add x to both sides of the equation: 4x + x = 40 − x + x; 5x = 40 Step 4: Isolate x. Divide both sides by 5: 5x / 5 = 40 / 5; x = 8 The number is 8.

Solved: Four times a certain number is equal to the number…

Define the variable.
Let the certain number be x.
Translate the problem into an equation.
"Four times a certain number" can be written as 4x.
"The number subtracted from 40" means 40 - x.
"is equal to" means =.
So, the equation is:
4x = 40 - x
Solve the equation for x.
Add x to both sides of the equation:
4x + x = 40 - x + x
5x = 40
Isolate x.
Divide both sides by 5:
5x / 5 = 40 / 5
x = 8

The number is 8.

Four times a certain number is equal to the number subtracted from 40 find the number

Step-by-step solution

Define the variable.

Translate the problem into an equation.

Solve the equation for x.

Isolate x.

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