1. 2x-5x+6.3 = -14.4

2x – 5x = -14.4 – 6.3

-3x = -20.7

Therefore: x = -20.7/-3 = 6.9

2. 2t +8 – t = -3

2t – t = -3 – 8

t = -11

3. 7g +14 – 5g = -8

Do the same as No 1.

4. 7 + 2 (a-3) = -9

Multiply out the brackets. so 2(a-3) is the same as (2xa – 2×3)

7 + 2a – 6 = -9

2a = -9 + 6 – 7

a = -5

5. 4(2a + 2) – 17 = 15

Do the same as no 4.

6. -6 – 3 (2k + 4) = 18

Do same as 4

7. 4 – 0.4 (3d – 5)

Same as 4

8. 2(3a+2) = -8

Same as 4.

9. 2/5 (5k + 35) – 8 = 12

Times through by 5 so

2/5 (5k + 35) – 8 = 12 becomes: 2 (5k + 35) – 40 = 60

so (2x5k + 2×35) – 40 = 60

is 10k + 70 – 40 = 60

then 10k = 30

k = 3

10. 1/2 (12n- 8)= 26

6n – 4 = 26

6n = 22

n = 3 2/3 (or 3.6666)

alternative way is to do:

1/2 (12n- 8)= 26

12n – 8 = 52

12 n =46

n = 3.6666 etc

well if u are, i can help u on the first one. i dont have time to do the other ones.

2x-5x+6.3=-14.4 1.subtract 6.3 from bothsides

-6.3 -6.3

———————-

2x-5x= -20.7 2. subract 5x from 2x

which equals,

-3x= -20.7 3.now divide -3 by both sides

x= 6.9

now plug it back in to make sure it’s correct.

2(6.9)-5(6.9)+6.3=-14.4

and yes viola it’s correct!

sorry.