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150. 1:4. 120:30. 120-30=90
Answer:
(g-f)x is the answers for the question
Step-by-step explanation:
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1) (-7,2)
y=2, -x+4=11, -x=11-4=7, x=-7
2) (-3,4)
-x+2y=11
y=4, -x+8=11, -x=3, x=-3
3) (1,6)
-x+2y=11
y=6, -x+12=11,-x=-1, x=1
