Question

slove the following equations by trail and error method 7x +9=30

Answer 1

Answer:

x=3

Step-by-step explanation:

let x=1

7(1) + 9 = 30

7+9=30

16 not equal to 30

let x=2

7(2) +9 =30

14+9 = 30

23 not equal to 30

let x= 3

7(3) +9 =30

21+9= 30

30= 30

LHS=RHS