Question

a) 2(5a-3)-a-4(3a-2)=0

b) 2b-(1-b)=11-b

c) 3y-2(y-1)=-6

d) 3(-5y)=90-5(3y-2)

Answer 1

a)  2(5a-3)-a-4(3a-2)=0

10a-6-a-12a-8=0

-3a=14

3a=14

a=[tex]\frac{14}{3}

a= 4 [tex]\frac{2}{3}

b)  2b-(1-b)=11-b

2b-1+b=11-b

4b=12

b=3

c) 3y-2(y-1)=-6

3y-2y+1=-6

y=-7

d) 3(-5y)=90-5(3y-2)

-15y=90-15y+10

0=100 ?? równanie sprzeczne