Question

A) (x +4,2)- 13 = 7,1; б)-(x+5,63) + 13,2 = 21,5; B) 14,8-(3,9 + y) = 8,37;г) 8,49 +(b-2,74) = 10,57.​

Answer 1

Объяснение:

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Answer 2

Let's solve the equations step by step:

A) (x + 4.2) - 13 = 7.1

First, add 13 to both sides of the equation to isolate the (x + 4.2) term:

x + 4.2 = 7.1 + 13

x + 4.2 = 20.1

Next, subtract 4.2 from both sides to solve for x:

x = 20.1 - 4.2

x = 15.9

So, the solution to equation A is x = 15.9.

B) 14.8 - (3.9 + y) = 8.37

First, simplify the equation by adding 3.9 to both sides:

14.8 - 3.9 - y = 8.37

Now, subtract 3.9 from 14.8:

10.9 - y = 8.37

Next, subtract 10.9 from both sides to isolate the variable y:

-y = 8.37 - 10.9

-y = -2.53

To solve for y, multiply both sides by -1 to change the sign:

y = 2.53

So, the solution to equation B is y = 2.53.

C) 8.49 + (b - 2.74) = 10.57

First, simplify the equation by subtracting 8.49 from both sides:

b - 2.74 = 10.57 - 8.49

b - 2.74 = 2.08

Next, add 2.74 to both sides to isolate the variable b:

b = 2.08 + 2.74

b = 4.82

So, the solution to equation C is b = 4.82.