Question

For 1-3 write an equivalent expression
1.) -3(7+5g)
2.) (x+7)+3y
3.) 2/9-1/5*x

Answer 1

1. -3 ( 7 + 5 g) = -21 - 15 g = -15 g - 21
2. (x + 7) + 3y = x + 3y + 7
3. 
   `(2)/(9) - (1)/(5) x \\ = > (10-9x)/(45) \\ = > (-9x+10)/(45)`

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer 2

1) –(3 • 7 • 3 • 5 • g)

2) 7+x+3⋅y

3) 2/9 – x/5