Two times the sum of half a number and six is four. Find the number.

The number is:

-8

Step-by-step explanation:

2(a/2 + 6 ) = 4

2*a/2 + 2*6 = 4

2a/2 + 12 = 4

a + 12 = 4

a = 4-12

a = -8

Check:

2(-8/2 + 6) = 4

2(-4+6) = 4

2*2 = 4

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb