3 years ago

How do you solve this equation -6x + 7y =13 and -6x +8y =20 using elimination

Mathematics

1 answer:

ohaa [14]3 years ago

8 0

Answer:

x=6,y= 7

Step-by-step explanation:

-6x +7y= 13

-6x+8y=20

-y = -7

divide through by -1

y =7

sub y= 7 in equation 1

then x= 6

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
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Left to Right

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Division Property of Equality
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Step-by-step explanation:

Step 1: Define

Identify

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Step 2: Solve for x

[Addition Property of Equality] Add 5 on both sides: 4x² = 80
[Division Property of Equality] Divide 4 on both sides: x² = 20
[Equality Property] Square root both sides: x = ±2√5

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