Question

find the value of the unknown variables

2x-3(2x+3) = 7
7x+(3+4x) = 6

solve it ( step by step explanation )​

Answer 1

Answer:

1) (a-b) (a+b) = a^2 - b^2

(2x)^2 - 3^2 = 7

4x^2 -9 = 7

4x^2 = 16

x^2 = 4

x = 2

Answer 2

Answer:

1. X=-4

2. X=0.27

Step-by-step explanation:

2x-3(2x+3) = 7

4x-9=7

X=-4