Question

Uprość wyrażenie.

a) 6(a+2b)-3(b+2c)=

b)4(b+3)+3(a-b)=

c)7(b+c)-3(b+2c)=

d)5(a+3)+2b-3(a+b)=

e)6(3+z)-4(2z+4)+2(8+z)=

f)-4(2x-7-3y)-12(-y-x)=

Answer 1

a) 6(a+2b)-3(b+2c)= 6a + 12b -3b -6c = 6a + 9b -6c

b)4(b+3)+3(a-b)= 4b + 12 +3a -3b = 3a + b + 12

c)7(b+c)-3(b+2c)= 7b + 7c -3b -6c = 4b +c

d)5(a+3)+2b-3(a+b)= 5a + 15 + 3b -3a -3b = 2a +15

e)6(3+z)-4(2z+4)+2(8+z)= 18 + 6z - 8z - 16 + 16 + 2z = 18

f)-4(2x-7-3y)-12(-y-x)= -8x + 21 - 12y + 12y + 12x = 20x + 21

Answer 2

a) 6a+12b-3b+6c=6a+9b+6c

b)4b+12+3a-3b=1b+12+3a

c) 7b+7c-3b+6c=4b+13c

d)5a+15+2b-3a-3b=2a+15-1b

e)18+6z-8z-16+16+2z=18

f)-8x+28+12y+12y+12x=4x+28+24y+12x