Question

Упростите уравнения: 2) 5с-5(2с-b)+2b; 3) 4x+16y-2x-20y+6x; 4) 3(1-x)-1+4x-5(x+2); 5) 0,3(8-3y)-3,2+0,8(y-7)

Answer 1

2) 5с-10с+5b+2b=7b-5c

3) 8x-4y

4) 3-3x-1+4x-5x-10=-4x-8

5)2.4-0.9y-3.2+0.8y-4.8=-1.6-0.1y

Answer 2

2. 5с-5(2с-b)+2b = 5c - 10c + 5b + 2b = -5c + 7b

3. 4x+16y-2x-20y+6x = 8x - 4y

4. 3(1-x)-1+4x-5(x+2) = 3 - 3x - 1 + 4x - 5x - 10 = -4x - 8

5. 0.3(8-3y)-3.2+0.8(y-7) = 2.4 - 0.9y - 3.2 + 0.8y - 5.6 = -0.1y - 6.4