Question

Find the value of the variable involved:

1- 2(x+4)=12
2- 3(4c-1)=2(5c+3)
3- 2(z+0.15)= -1.25
plz solve this question

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Answer 1

Answer:

1. x=2
2. c=9/2
3. z=0.95/2

Step-by-step explanation:

1) 2(x+4)=12

2x+8=12

2x=12-8

2x=4

x=4/2

x=2 is answer

2) 3(4c-1)=2(5c+3)

12c-3=10c+6

12c-10c-3-6=0

2c-9=0

2c=9

c=9/2 is answer

3) 2(z+0.15)=-1.25

2z+0.3=1.25

2z=0.95

z=0.95/2

Answer 2

Step-by-step explanation:

1. 2(x+4)=12

=> 2x +2(4) = 12

2x + 8 = 12

2x = 12 - 8

2x = 4

x = 4/2

=> x = 2

2. 3(4c-1) = 2(5c+3)

=> 3(4c) - 3(1) = 2(5c) - 2(3)

12c - 3 = 10c - 6

12c - 10c = 3 -6

2c = -3

=> c = -3/2

3. 2(z+0.15)= -1.25

2(z) + 2(0.15) = -1.25

2z + 0.3 = -1.25

-2z = 1.25 + 0.3

-2z = 1.55

z = 1.55/-2

=> z = -0.775