Question

A) 12 = 1 - 2 ( a - 1 ) B) 2 (x - 1 ) = 3x - 5 C) 2 ( 5+x) - 10 = 4 D) 3 + 4 ( 2x - 2 ) = 0 E) 3 (2 b + 1 ) + 4 b =9

Answer 1

A)12=1-2(a-1)
12=1 -2a+2
11=-2a+2
9=-2a
a= -4,5
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B)2(x-1)=3x-5
 2x-2=3x-5
x=3
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C) 2(5+x)-10=4
10+2x-10=4
2x=4
x=4/2
x=2
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D)3+4(2x-2)=0
3+8x-8=0
8x=8-3
8x=5
x=5/8
x=~0,62
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E)3(2b+1)+4b=9
6b+3+4b=9
10b=6
b=6/10
b=0,6