tati1496 tati1496

08-06-2021
Mathematics

contestada

If x+y=4a+7 and x-y=2a+5, solve for x in terms of a
A. 2a+2
B. 2a+5
C. 2a+6
D. 3a+4
E. 3a+6

Respuesta :

ewomazinoade ewomazinoade

17-06-2021

Answer:

A

Step-by-step explanation:

x + y = 4a + 7

x - y = 2a + 5

In both equations, make x the subject of the formula

x = 4a + 7 - y equation 1

x = 2a + 5 + y equation 2

Subtract equation 2 from equation 1

2a + 2 -2y

= 2a + 2

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