Question

Solve the following equatíons and verity the answers.
(a) 4a + 3 = 5a- 4
(b) 3{x-1)= 9x + 27​

Answer 1

Answer:

a) a=7 b) x=-5

Step-by-step explanation:

a) 4a + 3 = 5a - 4

4a - 5a= -4 -3

-a = -7

+ +

a=7

b) 3(x-1)=9x+27

3x-3 =9x+27

3x-9x=27+3

-6x =30

x =30/-6

x =-5

a=7 & x=-5

Answer 2

Step-by-step explanation:

a) 4a + 3 = 5a - 4

= 4a- 5a = -4-3

= - a = -7

= a = 7

Verification

= 4×7 + 3 = 5×7 - 4

= 28 + 3 = 35 - 4

= 31 = 31

b) 3(x-1) = 9x +27

= 3x - 3 = 9x + 27

= 3x - 9x = 27+3

= -6x = 30

= x = 30/-6

= x = -5

Verification

=3(x -1) = 9x+27

=3(-5-1)= 9×-5 + 27

= 3 × -6= -45 + 27

= -18 = -18