Question

1) 3 (5+x/2) =4+2x 2)0,71x+1,98=0,37x-1,763) 5 ( 5x -1)-2,7x+0,2x=6,5-0,5x ​

Answer 1

Ответ:

1)х=22

2)х=-11

3)х=23/26≈0.9

Объяснение:

1)15+3х/2-2х=4

3х-4х=8-30

х=22

2)0.71х-0.37х=-1.76-1.98

0.34х=-3.74

х=-11

3) 15х-5-2.5х+0.5х=6.5

13х=11.5

х=23/26≈0.9

Answer 2

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

Equation 1:
$3 \left(5 + \frac{x}{2}\right) = 4 + 2x$

First, distribute the 3 on the left side: $15 + \frac{3x}{2} = 4 + 2x$

Subtract 15 from both sides: $\frac{3x}{2} = -11 + 2x$

Subtract $2x$ from both sides: $\frac{3x - 4x}{2} = -11$

Simplify: $-\frac{x}{2} = -11$

Multiply both sides by -2 to solve for $x$: $x = 22$

Equation 2:
$0.71x + 1.98 = 0.37x - 1.76$

Subtract $0.37x$ from both sides: $0.71x - 0.37x + 1.98 = -1.76$

Simplify: $0.34x + 1.98 = -1.76$

Subtract 1.98 from both sides: $0.34x = -3.74$

Divide both sides by 0.34 to solve for $x$: $x \approx -11$

Equation 3:
$5(5x - 1) - 2.7x + 0.2x = 6.5 - 0.5x$

Distribute the 5 on the left side: $25x - 5 - 2.7x + 0.2x = 6.5 - 0.5x$

Combine like terms on both sides: $25x - 2.5x - 2.7x + 0.2x = 6.5 + 5$

Simplify: $20x - 2.5x = 11.5$

Combine like terms: $17.5x = 11.5$

Divide both sides by 17.5 to solve for $x$: $x \approx 0.657$

Please note that the solutions are approximate, as they involve decimal numbers. Make sure to double-check the calculations and solutions on your own as well.