Question

-6(2х+1)=-42-3х 1.6(7-5х)+4(2-0.4х)=0

Answer 1

Відповідь:

4 и 2

Покрокове пояснення:

-12х-6=-42-3х

9х=36

х=4

11,2-8х+8-1,6х=0

-9,6х=-19,2

х=2

Answer 2

Ответ:

3,2 ; 0.95 или 0

Пошаговое объяснение:

-6 (2x+1) =-42 -3x

-12x+6= -42-3x

-12x+3x=-42-6

-15x=-48

x= 48:15

x=3,2

1,6 (7-5x)+4(2-0,4x)=0

1,12-8x+8-1.6x =0

-8x-1,6x=0-1,12-8

-9,6x=-9.12

x= 9.12:9,6

x=0,95 или x=0

Answer 3

Let's solve the two equations step-by-step:

1. Solve the equation -6(2x+1) = -42-3x:

Expand the left side: -6 * 2x - 6 * 1 = -42 - 3x

Now, combine like terms: -12x - 6 = -42 - 3x

Next, move the variable terms to one side and the constant terms to the other side: -12x + 3x = -42 + 6

Combine like terms again: -9x = -36

Finally, isolate x by dividing both sides by -9: x = -36 / -9 x = 4

So, the solution for the first equation is x = 4.

2. Solve the equation 1.6(7-5x) + 4(2-0.4x) = 0:

Expand and distribute the terms: 1.6 * 7 - 1.6 * 5x + 4 * 2 - 4 * 0.4x = 0

Simplify: 11.2 - 8x + 8 - 1.6x = 0

Combine like terms: 11.2 + 8 - 8x - 1.6x = 0

Combine constants: 19.2 - 9.6x = 0

Next, move the variable term to one side and the constant term to the other side: 19.2 = 9.6x

Finally, isolate x by dividing both sides by 9.6: x = 19.2 / 9.6 x = 2

So, the solution for the second equation is x = 2.

Therefore, the solutions to the given equations are:

1. x = 4
2. x = 2