Question

check if the value given int the bracket is the equation or not .
a) 3x + 9 = 20 ( x = 3)
b) 7x - 15 = 6 ( x = 4) ​

Answer 1

Answer:

3x + 9 = 20

3 × 3 + 9 = 20

9 +9 = 18 ≠ 20

7x - 15 = 6

7 × 4 - 15 = 6

28 - 15 = 6

13 ≠ 6

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a) no:

3×3+9=18 not 20

b) no:

7×4-15=13 not 6

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