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daser333 [38]
3 years ago
8

Solve the system of equations by substitution. 3x + 4y - 12 x + 7y = 8

Mathematics
1 answer:
Mice21 [21]3 years ago
6 0

Step-by-step explanation:

3x + 4y = 12 \\ x + 7y = 8 \\ x = 8 - 7y \\ 3(8 - 7y) + 4y = 12 \\ 24 - 21y + 4y = 12 \\ 12 = 17y \\ y = 0.705 \\ x = 8 - 7(0.705) = 3.065 = 3.07

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