Ответ:
A)
−7.2(x−2)=1.8(x−2)
−9(x−2)=0
9(x−2)=0
x=2
B)
2x+15=75
2x=60
x=30
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Ответ:
A)
−7.2(x−2)=1.8(x−2)
−9(x−2)=0
−9(x−2)=0
9(x−2)=0
x=2
B)
2x+15=75
2x=60
2x=60
x=30