1.)x=5-y 2x+3y=7 2.)x+y=2-y x+y=2y-7 3.)y=-x+3 x-y=5
Matematika
rara965
Pertanyaan
1.)x=5-y
2x+3y=7
2.)x+y=2-y
x+y=2y-7
3.)y=-x+3
x-y=5
2x+3y=7
2.)x+y=2-y
x+y=2y-7
3.)y=-x+3
x-y=5
1 Jawaban
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1. Jawaban vonnyfransiska1
1. 2(5-y) +3y=7
=>10-y+3y=7
=>2y=-10+7
=>y=-3/2
=>y=-1½
3. x-(-x+3)=5
=>x+x-3=5
=>2x=5+3
=>x=8/2
=>x=4