Question

Usuń nawiasy i wykonaj redukcję wyrazów podobnych ;

-4(3x-6)-3(2+7x) =

5(3z-7)-9(-8z-6) =

-3(5x-4)+8(-3x+2) =

7x-3(5x+2)-6(7+2x) =

-5(3y-7)-2(6+4y)+3y =

Wykonaj działania i oblicz wartość liczbową wyrażenia ;

3(x-1)-2 dla x = 4,2

2(y+6)-4(y-6) dla y = 1/2 lub 0,5

3(a-8)-(5-2a) dla a = -0,5

4(x-y)-(-x+y) dla x = 3/2 , y = -1

4(y-3)-3(x+1) dla x = 4 , y = 2

3(2b+1)-4(a-2) dla a = 7 b = 1

9(x-7y)-(5y-2x)+20y dla x = 0,5 y = 0,3

(5x+7y)-8(y+1)+3(x-y) x= 1/2 y = 1/4

Answer 1

-4(3x-6)-3(2+7x) = -12x-24-6+21x = 12x-30

5(3z-7)-9(-8z-6) = 15z-35+72z-54 = 87z-89

-3(5x-4)+8(-3x+2) = -15x-12-24x+16 = -39x+4

7x-3(5x+2)-6(7+2x) = 7x-15x+6-42+12x = 4x-36

-5(3y-7)-2(6+4y)+3y = -15y-35-12+8y+3y= -4y-48

3(x-1)-2 = 3(4,2-1)-2 = 12,6-3-2 = 7,6

2(y+6)-4(y-6) = 2(0,5+6)-4(0,5-6) = 1+12-2-24 = -13

3(a-8)-(5-2a) = 3(-0,5-8)-(5-2*-0,5) = -1,5-14-4 = -19,5

4(x-y)-(-x+y) = 4(3/2+1)-(3/2-1) = 6+4-3/2-1 = 7,5

4(y-3)-3(x+1) = 4(2-3)-3(4+1) = 8-12-12+3 = -13

3(2b+1)-4(a-2) = 3(2+1)-4(7-2) = 6+3-28-8 = -27

9(x-7y)-(5y-2x)+20y = 9(0,5-7*0,3)-(5*0,3-2*0,5)+20*0,3 = 4,5-18,9-1,5-1 = -16,9

(5x+7y)-8(y+1)+3(x-y) = (5*1/2+7*1/4)-8(1/4+1)+3(1/2-1/4) = 5/2+7/4-2+8+3/2-3/4 = 11