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3 years ago

Find two numbers whose sum is 42 and whose difference is 16.

1 answer:

3 0

A + b = 42
a - b = 16 ==> a = b + 16

b + 16 + b = 42
2b + 16 = 42
2b = 42 - 16
2b = 26
b = 26/2
b = 13 <===

a = b + 16
a = 13 + 16
a = 29 <===

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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 II

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