Question

RESOLVA :

A)
4X+Y=8
X-Y=2

B)
3X+2Y=5
X-Y=0

Answer 1

a) \{ {{4x+y=8} {x-y=2}} 
 
5x=10
x=2

8+y=8
y=0
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b)$\left \{ {{3x+2y=5} \atop {x-y=0}} \right.$

$[tex] \left \{ {{3x+2y=5. (-1)} \atop {x-y=0. (3) } \right$

-3x-2y=-5
3x-3y=0

-5y=-5
y=1
x=1