Question

1) 7x+3=30-2x 2) 3/8 x+15=1/6 x×10 3) 0,3 (x-2)=0,2x+2

Answer 1

Ответ:

1) 7х+2х=30-3

9х=27

х=27:9

х=3

Answer 2

It looks like you've provided three equations. Let's solve each of them step by step:

Equation 1: 7x + 3 = 30 - 2x

Combine like terms: 7x + 2x = 30 - 3 9x = 27

Divide both sides by 9: x = 27 / 9 x = 3

Equation 2: (3/8)x + 15 = (1/6)x * 10

Distribute on the right side: (3/8)x + 15 = (10/6)x

Multiply both sides by 24 to eliminate fractions (LCM of 8 and 6): 18x + 360 = 40x

Subtract 18x from both sides: 360 = 22x

Divide both sides by 22: x = 360 / 22 x ≈ 16.3636

Equation 3: 0.3(x - 2) = 0.2x + 2

Distribute on the left side: 0.3x - 0.6 = 0.2x + 2

Subtract 0.2x from both sides: 0.1x - 0.6 = 2

Add 0.6 to both sides: 0.1x = 2.6

Divide both sides by 0.1: x = 2.6 / 0.1 x = 26

So, the solutions for the given equations are:

1. x = 3
2. x ≈ 16.3636
3. x = 26