92 срочно Помогите!!!

Question

92 срочно
Помогите!!!

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Answer 1

1) 1-4(x+1)=1.8-1.6x
1-4x-1=1.8-1.6x
-4x+1.6x=-1+1-1.8
-2.4x=-1.8
x=0.75
2) 3(0.5x-4)+8.5x=10x
1.5x+8.5x-10x=12
x=0