1) 9-5(x+1)=4+x 2)13,7-2,2x=1,5x+2,6 3)8-3x=4(x-1)=(x-6)

Question

1) 9-5(x+1)=4+x
2)13,7-2,2x=1,5x+2,6
3)8-3x=4(x-1)=(x-6)

Answer 1

1.
9-5x-5=4+x
-5x=4-9+5
-5x=0
x=0
2.
-2,2x-1,5x=2,6-13,7
-3,7x=-11,1
x=3

Comments

А третий ?

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3. 8-3x=4x-4=x-6

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Да

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8-3x-4x+4=x-6            12-7x=x-6        -7x+x=-6-12        -6x=-18

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x=3