theirvoice945
theirvoice945
16-02-2020
Mathematics
contestada
solve the equations
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meqanho
meqanho
16-02-2020
a) 2x + 3y = 2. (1)
x - 2y = 8. (2)
modify (1) to be: 2x = 2-3y
= x = 1-1.5y
put (1) into (2) so: (1-1.5y)-2y = 8
-3.5 y = 7
3.5 y = -7
y = -7/3.5
y=-2
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