Question

(x + 27) - 12 = 42; 115 – (35 + y) = 39;

Answer 1

Ответ:

27 и 41

Пошаговое объяснение:

1. (х+27)-12=42

х+27=42+12

х+27=54

х=54-27

х=27

2. 115-(35+у)=39

115-35-у=39

80-у=39

-у=-41

у=41

Answer 2

To solve these equations, we need to isolate the variable (x or y) on one side of the equation. We can do this by using inverse operations (performing the opposite operation on both sides of the equation).

Let's start with the first equation:

(x + 27) - 12 = 42

First, we can simplify the left-hand side by combining like terms:

x + 15 = 42

Next, we can isolate the variable by subtracting 15 from both sides:

x = 27

So the solution to the first equation is x = 27.

Now let's move on to the second equation:

115 – (35 + y) = 39

First, we can simplify the expression inside the parentheses by adding 35 and y:

115 – 35 – y = 39

Next, we can simplify the left-hand side by subtracting 35 from both sides:

80 – y = 39

Finally, we can isolate the variable by subtracting 80 from both sides:

-y = -41

To get the value of y, we need to multiply both sides by -1:

y = 41

So the solution to the second equation is y = 41.

Therefore, the solutions to the system of equations are x = 27 and y = 41.

Answer 3

To solve the equations:

1. (x + 27) - 12 = 42

First, simplify the left side of the equation by combining like terms inside the parentheses:

x + 15 = 42

Then, isolate the variable x by subtracting 15 from both sides:

x = 27

So the solution to the equation is x = 27.

2. 115 – (35 + y) = 39

First, simplify the parentheses by adding the numbers inside:

115 - 35 - y = 39

Then, simplify further by subtracting 35 from 115:

80 - y = 39

Next, isolate the variable y by subtracting 80 from both sides:

-y = -41

Finally, solve for y by multiplying both sides by -1:

y = 41

So the solution to the equation is y = 41.