Question

1.-4х-8(9-2х) 2.1/3(12-2,1у)+0,3у 3.6(3х-2)+4(5х-1) 4.-7(3-4с)+140(0,5+2с) 5.3(2,1х-у)-2,8(2х-3у 6.0,4(8т+7)-1,6(2т-3) Срочно!!!!!

Answer 1

1) -4х-8(9-2х)=-4х-72+16х = (16х-4х)-72=12х-72
2) 1/3(12-2,1у)+0,3у=-0,4у+4
3) 6(3х-2)+4(5х-1)=38х-16
4) -7(3-4с)+140(0,5+2с)=56-14
5) 3(2,1х-у)-2,8(2х-3у)=0,7х+5,4у
6) 0,4(8т+7-1,6(2т-3)=7,6

Answer 2

1. Let's simplify the expression: -4x - 8(9 - 2x)

First, distribute -8 to the terms inside the parentheses: -4x - 8 * 9 + 8 * 2x

Simplifying further: -4x - 72 + 16x

Combining like terms: (16x - 4x) - 72

Simplifying: 12x - 72

2. Let's simplify the expression: 1/3(12 - 2.1y) + 0.3y

First, distribute 1/3 to the terms inside the parentheses: 1/3 * 12 - 1/3 * 2.1y + 0.3y

Simplifying further: 4 - 0.7y + 0.3y

Combining like terms: (-0.7y + 0.3y) + 4

Simplifying: -0.4y + 4

3. Let's simplify the expression: 6(3x - 2) + 4(5x - 1)

First, distribute 6 and 4 to the terms inside the parentheses: 18x - 12 + 20x - 4

Combining like terms: (18x + 20x) + (-12 - 4)

Simplifying: 38x - 16

4. Let's simplify the expression: -7(3 - 4c) + 140(0.5 + 2c)

First, distribute -7 and 140 to the terms inside the parentheses: -21 + 28c + 70 + 280c

Combining like terms: (28c + 280c) + (-21 + 70)

Simplifying: 308c + 49

5. Let's simplify the expression: 3(2.1x - y) - 2.8(2x - 3y)

First, distribute 3 and -2.8 to the terms inside the parentheses: 6.3x - 3y - 5.6x + 8.4y

Combining like terms: (6.3x - 5.6x) + (-3y + 8.4y)

Simplifying: 0.7x + 5.4y

6. Let's simplify the expression: 0.4(8t + 7) - 1.6(2t - 3)

First, distribute 0.4 and -1.6 to the terms inside the parentheses: 3.2t + 2.8 - 3.2t + 4.8

Combining like terms: (3.2t - 3.2t) + (2.8 + 4.8)

Simplifying: 7.6