Question

9х-26=30+2х 1,9-0,5(7-3у)=0,4(4у-6)

Answer 1

Ответ:

1)x=8

2)y=8

Пошаговое объяснение:

1)9х-26=30+2х

9x-2x-26=30

9x-2x=30+26

7x=30+26

7x=56

x=8

2)1,9-3,5+1,5y=0,4(4y-6)

1,9-3,5+1,5y=1,6y-2,4

-1,6+1,5y=1,6y-2,4

1,5y-1,6y=-2,4+1,6

-0,1y=-2,4+1,6

0,1y=-0,8

y=8

Answer 2

It looks like you've provided a system of equations with two equations involving multiple variables. Let's solve it step by step.

Equation 1: 9x - 26 = 30 + 2x

First, let's combine like terms on the left side: 7x - 26 = 30

Now, isolate x by adding 26 to both sides: 7x = 56

Finally, divide both sides by 7 to solve for x: x = 8

Equation 2: 1.9 - 0.5(7 - 3y) = 0.4(4y - 6)

Let's simplify this equation step by step:

First, simplify the expression within the parentheses: 1.9 - 0.5(4) + 0.5(3y) = 0.4(4y - 6)

1.9 - 2 + 1.5y = 1.6y - 2.4

Now, combine like terms on both sides: -0.1 + 1.5y = 1.6y - 2.4

Next, isolate y terms on one side by subtracting 1.6y from both sides: -0.1 - 0.1y = -2.4

Now, isolate the y term by adding 0.1 to both sides: -0.1y = -2.3

Finally, solve for y by dividing both sides by -0.1: y = 23

So, the solution for the system of equations is: x = 8 y = 23