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King
Mathematics
23 February, 09:04
1. - 9x=16-y
12x=-5-y
+1
Answers (
1
)
Saige Waller
23 February, 09:11
0
-9x=16-y equation 1
12x=-5-y equation 2
x=-5-y:12 from equation 2
substitute this x in equation 2
so
-9 (-5-y:12) = 16-y
15+3y=64-4y
7y=49
y=7
and then substitute this value of y in equation (x=-5-y:12)
so x = - 5-7:12
x=-1
so y=7 and x=-1
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