Question

If a = 2, find b, c, and d.
a + b = c
a-c=d
a+b=5

Answer 1

a=2

b=3

c=5

d=-3

Explanation:

a + b = c

a-c=d

a+b=5

a+b =5

a = 2

2+b =5

Subtract 2 from each side

2+b-2 =5-2

b=3

a + b = c

2+3 = c

5=c

a-c=d

2-5 =d

-3 =d