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Anuta_ua [19.1K]
3 years ago
12

Substitute 3x+y=4 5x-y=22

Mathematics
1 answer:
Mrac [35]3 years ago
4 0
Simultaneous Equations

3x + y = 4
5x  - y = 22
The signs of the matching values aren't the same so we add the rest of the equations.
8x = 26
Divide both sides by 8 to get x = 3.25
Now substitute back into the first equation.
(3 x 3.25) + y = 4
9.75 + y = 4
Subtract 9.75 from both sides
y = -5.75
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