3 years ago

Answers plz I need help really badly

Mathematics

2 answers:

sattari [20]3 years ago

8 0

8. 55/12 and 9 is 7
have a good day

topjm [15]3 years ago

8 0

Number 8 is 4.5833 I double checked

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Step-by-step explanation:

$x,\ y-numbers\\\\\text{The system of equations:}\\\\\underline{+\left\{\begin{array}{ccc}x+y=126\\x-y=42\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad2x=168\qquad\text{divide both sides by 2}\\.\qquad x=84\\\\\\\text{Put the value of}\ x\ \text{to the first equation:}\\\\84+y=126\qquad\text{subtract 84 from both sides}\\y=42$

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