Question

Oblicz:
x-3,6=1,2 ile wynosi x?
14x-8x-2=10 ile to x?
3a+4a+1= 29 ile to a?
8b+4b-8=40 ile to b?
x-5x+4=16 ile to x?

Answer 1

1) x-3,6=1,2
3,6 - 1,2 = x
x=2,4

2) 14x-8x-2=10
6x=12 |:6
x=2

3) 3a+4a+1= 29
7a=28 |:7
a=4

4) 8b+4b-8=40
12b=48 |:12
b=4

5) x-5x+4=16
4x=12 |:4
x=3

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Answer 2

A)
x - 3,6 = 1,2        |+3,6
x = 4,8

b)
14x - 8x - 2 = 10
6x - 2 = 10    |+2
6x = 12      |:6
x = 2

c)
3a + 4a + 1 = 29 
7a + 1 = 29      |-1
7a = 28     |:7
a = 4

d)
8b + 4b - 8 = 40
12b - 8 = 40       |+8
12b = 48         |:12
b = 4

e)
x - 5x + 4 = 16 
-4x + 4 = 16      |-4
-4x = 12         |:(-4)
x = (-3)