naiomireyes74p2aybs
23.08.2019 •
Mathematics
Solve the following pairs of simultaneous equations.
a) 2x - 2y = -4
5x + 4y = 17
b) 2x - 3y = 6
4x - 5y = 9
c) x / 3 + y / 2 = 3 / 2
x / 2 + y / 5 = -1 / 2
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Ответ:
x=-2,y=10
Step-by-step explanation:
y=8-xequation 1
4-y=-5equation 2
Now,
putting the value of y in equation 2,
4-(8-x)=-5
4-8+x=-5
-3+x=-5
x=-5+3
x=-2
Then,
putting the value of x in equation 1
y=8+2
y=10