Question

Самостоятельная!!!!!!!!​

Answer 1

Ответ:

1.

1) 5х+20у

2) 42b+3-12+66b=108b-9

3) 4a³+a²+3a-4a²-a-3=4a³-3a²+2a-3

2.

1) (-3+5)(-3-6)=9+18-15-30=-16

2) (-0,5-6)(-0,5-1)-(-0,5+3)(-0,5+2)=6,5*1,5-2,5*1,5=6

3.

1) 10x²-6x-10x²=-30

-6x=-30

x=5

2) 10x²+9x=8+13x-3+10x²

9x-13x=8-3

-4x=5

x= -5/4

4.

2(3-5x) + 1 = 4(1-x)

6-10x-1-4-4x

5-10x=4-4x

-10x+4x=4-5

-6x=-1

x=1/6.