Question

Раскройте скобки:(3а-2,4)*(-5) Решите уравнение:4*(x-0,8)02x Приведите подобные слагаемые:-9+3у+4х+у Упростите выражение:х-(х-у) Упростите выражение:3,2*(х-5)+1,8*(х+1,5) Поожалуйстааааа оооооооооооочень надо!!!Спасибо!

Answer 1

(3а-2,4)*(-5)=-15а+12=12-15а

 

4*(x-0,8)02x = (4х-3,2)*0,2х= 0,8х-0,64

 

-9+3у+4х+у = 3х+5у-9

 

х-(х-у) =- х^2+ху

 

3,2*(х-5)+1,8*(х+1,5) = 3,2х-16+1,8х+2,7 = 5х-13,3

 

 

 

 

 

Answer 2

Solving Mathematical Expressions

1. Expand the Expression (3a - 2.4) * (-5): - The expanded expression is -15a + 12. - Source 1

2. Solve the Equation 4 * (x - 0.8) = 2x: - First, distribute the 4: 4x - 3.2 = 2x. - Then, isolate x: 4x - 2x = 3.2, so 2x = 3.2. - Finally, solve for x: x = 1.6. - Source 2

3. Combine Like Terms -9, 3y, 4x, y: - The like terms are 4x and 3y. - The combined expression is 4x + 3y - 9. - Source 3

4. Simplify the Expression x - (x - y): - Distribute the negative sign: x - x + y. - Simplify: y. - Source 4

5. Simplify the Expression 3.2 * (x - 5) + 1.8 * (x + 1.5): - First, distribute the constants: 3.2x - 16 + 1.8x + 2.7. - Then, combine like terms: 5x - 13.3. - The simplified expression is 5x - 13.3. - Source 5

I hope this helps! If you have any more questions, feel free to ask.