Question

1)3y-1,5y=26-16,4 2)2х-х=4 1/4+8 3/5

Answer 1

1)3y-1,5y=26-16,4
1,5y=9.6
y=9.6/1.5
y=6.4
Ответ: у=6,4

2)2х-х=4 1/4+8 3/5
x=4.25+8.6
x=12.85
Ответ: х= 12,85 

Answer 2

Let's solve the equations one by one:

1. 3y - 1,5y = 26 - 16,4

To simplify the equation, we can combine the like terms on both sides:

1,5y = 9,6

Now, we can isolate y by dividing both sides of the equation by 1,5:

y = 9,6 / 1,5

y ≈ 6.4

So the solution to the equation is y ≈ 6.4.

2. 2x - x = 4 1/4 + 8 3/5

First, let's simplify the right side of the equation:

4 1/4 + 8 3/5 = 17/4 + 43/5

To add these fractions, we need a common denominator, which is the least common multiple of 4 and 5, which is 20. So let's convert the fractions:

17/4 + 43/5 = (17/4) * (5/5) + (43/5) * (4/4) = 85/20 + 172/20 = 257/20

Now we can rewrite the equation as:

2x - x = 257/20

Combine the x terms on the left side:

x = 257/20

So the solution to the equation is x = 257/20.