Question

the equation have the root -5 is
(a) 5t-15 = -10
(b) a\5 + 3=2
(c) 3(n+2)=21
(d) 7x-18 = x +12​

Answer 1

Step-by-step explanation:

root should be -5

just put that in place of x, t, a and n

5(-5) -15 = -10

-25-15 = -10

-40 = -10

so it's not the root

a/5 + 3=2

-5/5 +3=2

3=2+1

so yes it is root of the equation

3(n+2)=21

3(-5+2)=21

-9 = 21

so it's not the root

7x-18 = x +12

7(-5)-18=(-5)+12

-35-18 = 8

so it's not root

so 2) satisfied -5 as root

a/5 + 3=2

so it is answer