Question

a) -2 (z-5)+3z-(2-4)

b) 2x-4 (6-5x)-49-(5-3x)

c) 1-3 (4x+7)=2 (x-10)

d) 3 (-1-5x)-(-7x+6)=-4 (x-3)

e) x+2 (19-3x)= -10

Answer 1

a) -2 (z-5)+3z-(2-4)=         -2z+10+3z-2+4=  z+12=   z=-12
b) 2x-4 (6-5x)-49-(5-3x)=         2x-24+20x-49-5+3x = 25x-78 = x=78/25
c) 1-3 (4x+7)=2 (x-10)=      1-12x-21=2x-20 =     -12x-2x=-20+20    -14x=0  x= 14

d) 3 (-1-5x)-(-7x+6)-4 (x-3)=   -3-15x+7x-6=-4x+12 = -15x+7x+4x=12+3+6 = -4x=21 x= -21/4

e) x+2 (19-3x)= -10   x+38-6x=-10     -5x=-10-38    5x=-48     x=-48/5