26 August, 16:33
What's is the answer to y=3x+7
26 August, 18:21
( - 8, - 17)
Given the 2 equations
y = 3x + 7 → (1)
y = x - 9 → (2)
Substitute y = 3x + 7 into (2)
3x + 7 = x - 9 (subtract x from both sides)
2x + 7 = - 9 (subtract 7 from both sides)
2x = - 16 (divide both sides by 2)
x = - 8
Substitute x = - 8 into either of the 2 equations for corresponding value of y
Substituting into (2)
y = - 8 - 9 = - 17
Solution is ( - 8, - 17)
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