Question

1) 4(x-3)=x+6 2) 4-6(x+2)=3-5x 3) (5x+8)-(8x+14)=9 4) 2,7+3y=9(y-2,1) 5)0,3(8-3y)=3,2-0,8(y-7) 6)5,6(1,3x-1,5)=3x+3_1,3

Answer 1

4(x-3)=x+6
4x-12=x+6
4x-x=6+12
3x=18
x=18:3
x=6

4-6(x+2)=3-5x
4-6x-12=3-5x
-8-6x=3-5x
-6x+5x=3+8
-x=11
x=-11

(5x+8)-(8x+14)=9
5x+8-8x-14=9
-3x-6=9
-3x=6+9
-3x=15
x=- 5

2,7+3y=9(y-2,1)
2.7+3y=9y-18.9
3y-9y=-18.9-2.7
-6y=-21.6
y=3.6

0,3(8-3y)=3,2-0,8(y-7)
2.4-0.9y=3.2-0.8y+5.6
-0.9y+0.8y=8.8-2.4
-0.1y=6.4
y=-64

5,6(1,3x-1,5)=3x+3  1/3
7,28x-8,4=3x+3  1/3
7.28x-3x=3  1/3 + 8.4
4.28x=10/3+8.4|*3
12,84x=10+25,2
x=2  952/1284 = 2  238 / 321

Answer 2

1. 4х-12=х+6
4х-х=12+6
3х=18
Х=6
2. 4-6х-12=3-5х
-6х+5х=3-4+12
-х=-1+12
-х=11
Х=-11
3. 5х+8-8х-14=9
5х-8х=9-8+14
-3х=15
Х=-5
4. 2,7+3у=9у-18,9
3у-9у=-18,9-2,7
-6у=-21,6
У=3,6
5. 2,4-0,9у=3.2-0,8у+5,6
-0,9у+0,8у=3,2-5,6-2,4
-0.1у=-4.8
У=48
6. 7,28х-8,4=3х
Я не поняла, что такое 3_1,3

Answer 3

1. Solve the equation 4(x-3) = x+6: Expand: 4x - 12 = x + 6 Rearrange: 4x - x = 6 + 12 Combine like terms: 3x = 18 Divide by 3: x = 6

2. Solve the equation 4 - 6(x+2) = 3 - 5x: Expand: 4 - 6x - 12 = 3 - 5x Rearrange: -6x + 5x = 3 - 4 + 12 Combine like terms: -x = 11 Multiply by -1: x = -11

3. Solve the equation (5x+8) - (8x+14) = 9: Expand: 5x + 8 - 8x - 14 = 9 Combine like terms: -3x - 6 = 9 Add 6: -3x = 15 Divide by -3: x = -5

4. Solve the equation 2.7 + 3y = 9(y-2.1): Expand: 2.7 + 3y = 9y - 18.9 Rearrange: 3y - 9y = -18.9 - 2.7 Combine like terms: -6y = -21.6 Divide by -6: y = 3.6

5. Solve the equation 0.3(8-3y) = 3.2 - 0.8(y-7): Expand: 2.4 - 0.9y = 3.2 - 0.8y + 5.6 Rearrange: -0.9y + 0.8y = 3.2 + 5.6 - 2.4 Combine like terms: -0.1y = 6.4 Divide by -0.1: y = -64

6. Solve the equation 5.6(1.3x - 1.5) = 3x + 3 - 1.3: Expand: 7.28x - 8.4 = 3x + 1.7 Rearrange: 7.28x - 3x = 1.7 + 8.4 Combine like terms: 4.28x = 10.1 Divide by 4.28: x = 2.36