An equation is formed of two equal expressions. The correct option is A.
What is an equation?
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The equation that is true for the value of a=7 is,
A. a + 2(a - 3) = 15
7 + 2(7-3) = 15
7 + 8 = 15
This equation is true for the value a = 7.
B. 4a – 4(14 – a) = 24
4(7) - 4(14-7) = 24
28 - 4(2) = 24
20 ≠ 24
This equation is not true for the value a = 7.
C. 2a + 47 = 105
2(7) + 47 = 105
24 + 47 = 105
71 ≠ 105
This equation is not true for the value a = 7.
D. 3a + 2(a – 3) = 34
3(7) + 2(7-3) = 34
21 + 8 = 34
29 ≠ 34
This equation is not true for the value a = 7.
E. 4a – 2a = 18
4(7) - 2(7) = 18
28 - 14 = 18
14 ≠ 18
This equation is not true for the value a = 7.
Hence, the correct option is A.
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