-3(5x - 7) = -4x + 3(3x + 7)

x = 0

Step-by-step explanation:

Given

- 3(5x - 7) = - 4x + 3(3x + 7) ← distribute parenthesis on both sides

- 15x + 21 = - 4x + 9x + 21 , that is

- 15x + 21 = 5x + 21 ( subtract 5x from both sides )

- 20x + 21 = 21 ( subtract 21 from both sides )

- 20x = 0 , thus

x = 0

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.