3 years ago

3x + 9x= 6x + 42 i would also like an explanation

Mathematics

1 answer:

lys-0071 [83]3 years ago

6 0

Answer:

x=7

Step-by-step explanation:

3x+9x=6x+42 add simalar elements 3x+9x=12x

12x=6x+42

12x-6x=6x+42-6x subract 6x from both sides

6x=42 simplify

6x/6=42/6 divide both by 6

x=7

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

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