Question

10x + 6(x + 8) = 99 - x;=34 + 2(2x - 9) = 28;=10(7y - 2) = 120;=​

Answer 1

1)

10x + 6(x + 8) = 99 - x

10x + 6x + 48 = 99 - x

16x + 48 = 99 - x

17x = 51

x = 3

Ответ: 3.

2)

34 + 2(2x - 9) = 28

34 + 4x - 18 = 28

4x + 16 = 28

4x = 12

x = 3

Ответ: 3.

3)

10(7y - 2) = 120

70y - 20 = 120

70y = 140

y = 2

Ответ: 2.

Answer 2

Ответ:

Пошаговое объяснение:

1)10x+6x+48=99-x

17x=51

X=3

2)34+4x-18=28

4x=28-16

4x=12

X=3

3)70y-20=120

70y=140

y=2

Answer 3

To solve each equation, we'll follow these steps:

1. Simplify both sides of the equation.
2. Isolate the variable on one side of the equation.
3. Solve for the variable.

Let's solve each equation one by one:

1. 10x + 6(x + 8) = 99 - x

Expand the expression inside the parentheses:

10x + 6x + 48 = 99 - x

Combine like terms:

16x + 48 = 99 - x

Now, isolate the variable terms on one side and the constant terms on the other side. Let's move the constant term to the left side by adding x to both sides:

16x + x + 48 = 99

Combine the x terms:

17x + 48 = 99

Now, move the constant term to the right side by subtracting 48 from both sides:

17x = 99 - 48

17x = 51

Finally, solve for x by dividing both sides by 17:

x = 51 / 17

x = 3

So, the solution for the first equation is x = 3.

2. 34 + 2(2x - 9) = 28

First, simplify the expression inside the parentheses:

34 + 4x - 18 = 28

Combine like terms:

4x + 16 = 28

Next, isolate the variable term by moving the constant term to the right side:

4x = 28 - 16

4x = 12

Now, solve for x by dividing both sides by 4:

x = 12 / 4

x = 3

So, the solution for the second equation is x = 3 (same as the first one).

3. 10(7y - 2) = 120

Expand the expression inside the parentheses:

70y - 20 = 120

Now, isolate the variable term by moving the constant term to the right side:

70y = 120 + 20

70y = 140

Finally, solve for y by dividing both sides by 70:

y = 140 / 70

y = 2

So, the solution for the third equation is y = 2.

To summarize:

1. x = 3
2. x = 3
3. y = 2