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3 years ago

4x - 10 + 5x = 71 solve the equation and enter the value of x below

Mathematics

2 answers:

Hatshy [7]3 years ago

6 0

Add ten to both sides
Then combine the like terms
9x=81
X= 9

Liono4ka [1.6K]3 years ago

3 0

Answer:

x = 9

Step-by-step explanation:

First, combine like terms. Like terms are terms with the same variable as well as the same amount of said variables:

4x - 10 + 5x = 71

(4x + 5x) - 10 = 71

9x - 10 = 71

Note the equal sign, what you do to one side, you do to the other. Isolate the variable, x. Do the opposite of PEMDAS.

PEMDAS is the order of operations, and stands for:

Parenthesis

Exponents (& Roots)

Multiplications

Divisions

Additions

Subtractions

First, add 10 to both sides of the equation:

9x - 10 (+10) = 71 (+10)

9x = 71 + 10

9x = 81

Next, isolate the variable x by dividing 9 from both sides of the equation:

(9x)/9 = (81)/9

x = 81/9 = 9

x = 9 is your answer.

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4x - 10 + 5x = 71 solve the equation and enter the value of x below ​

4x - 10 + 5x = 71 solve the equation and enter the value of x below