10. 4x - 7y = 3x - 7y = -15
1 answer:
Answer:
(2/5,-1/5)
Step-by-step explanation:
solve the second equation for x
x = -7y - 1
replace the x in the first equation
4•(-7y-1) - 7y = 3
- 35y = 7
solve for y
35y = - 7
y = - 1/5
which gives us
x = -7y-1
y = -1/5
then use the y value to solve for x
x = -7(-1/5)-1 = 2/5
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