Question

Calcule:

7x+5-x+8=34

5(3-2x)=55

27=3(x+3)

16x+2(7x+8)-9=67

Answer 1

7x+5-x+8=54
6x=54-15
6x=39
X=39/6
X=6,5

5(3-2x)=55
15-10x=55
-10x=55-15
-10x(-1)=40(-1)
10x=-40
X=-40/10
X=-4

27=3(x+3)
27=3x+9
-3x=9-27
-3x=-18
X=-18/-3
X=6

16x+2(7x+8)-9=67
16x+14x+16-9=67
30x+7=67
30x=67-7
30x=60
X=60/30
X=2

Answer 2

7X + 5 - X + 8 = 34

6X = 34 - 8 - 5

6X = 22

X = 22/6

X = 11/3

5( 3 - 2X ) = 55

15 -10x = 55

-10x = 55 - 15

-10x = 40

-x = 40/10

- x = 4             x -1

x = -4

27 = 3(x + 8)

27  = 3x + 24

- 3x = 24 - 27

- 3x = -3                           x - 1

x = 3/3

x = 1

16x + 2( 7X + 8 ) - 9 = 67

16X +14X +16 - 9 = 67

30X = 67 - 16 + 9

30X = 76 - 16

30X = 60

X = 60/30

X = 2