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3 years ago

Find x in ecuation 4x+30=40

Mathematics

2 answers:

aliya0001 [1]3 years ago

8 0

2.5

4x+30=40

-30 -30

4x=10

/4 /4

x=2.5

MaRussiya [10]3 years ago

3 0

4x+30=40

What you would do is subtract 30 from 30 and 40 which would give you 10 and then what you would do is divide the 10 by 4 to get 2.5. Therefore X=2.5. And to check your work you would plug in 2.5 in place of X and the answer to that equation should be 10.

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)
Midpoint Formula: $\displaystyle (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

Step-by-step explanation:

Step 1: Define

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