How to solve the equation 1 △ 2 × (7 + 15 + 6) x = 20

How to solve the equation 1 △ 2 × (7 + 15 + 6) x = 20


The solution is as follows:
1÷2×(7+15+6)x=20
Multiply both sides by 2 to get (7 + 15 + 6) x = 40
In brackets, 28x = 40
Divide both sides by 28 to get x = 10 / 7



How to solve the equation 6 (x + 0.3) = 9.6


6(x+0.3)=9.6
x+0.3=1.6
x=1.3