Question

solve these equations by trial and error method.
a) x + 4 = 7
(b) 2x = 18
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Answer 1

Answer:

a)x=3

b)x=9 this is the answer pls like and follow me

Answer 2

Step-by-step explanation:

by using trial and error method:

a. x+4=7

let x=0

0+4=7

4 is not equals to 7

so,x is not 0

let x=1

1+4=7

5 is not equals to 7

so x is not 1

let x=2

2+4=7

6 is not equals to 7

so ,x is not 2

let x=3

3+4=7

7=7

so x=3

b.2x=18

let x=1

2*1= 18

2 is not equal to 18

so, xis not 1

let x=2

2*2=18

4is not equals to 18

so, x is not 2

let x=3

2*3=18

6 is not equals to 18

so x is not 3

let x=4

2*4=18

8 is not equals to 18

so x is not 4

let x=5

2*5=18

10 is not equals to 18

so x is not 5

let x=6

2*6=18

12is not equals to 18

so x is not 6

let x=7

2*7=18

14 is not equals to 18

so xis not 7

let x=8

2*8=18

16 is not equals to 18

so xis not 8

let x=9

2*9=18

18=18

so,x=9