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Morgarella [4.7K]
4 years ago
7

What is the solution to the system 4x – 6y = 42 x + 6y = 48

Mathematics
2 answers:
andre [41]4 years ago
8 0
4x-6y=42 \\
\underline{x+6y=48 \ \ } \\
4x+x=42+48 \\
5x=90 \\
x=\frac{90}{5} \\
x=18 \\ \\
x+6y=48 \\
18+6y=48 \\
6y=48-18 \\
6y=30 \\
y=\frac{30}{5} \\
y=6 \\ \\
\boxed{(x,y)=(18,6)}
jenyasd209 [6]4 years ago
5 0
4x -  6y = 42
<u>1x + 6y = 48</u>
        <u>5x</u> = <u>90</u>
         5      5
          x = 18
1x + 6y = 48
   18 + 6y = 48
<u>- 18          - 18</u>
           <u>6y</u> = <u>30</u>
            6      6
             y = 5
       (x, y) = (18, 5)
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