Linear equation

properties of linear equations
x + 3 = 4

5(x+10)-30 = 5x – 18
equation is false means “Contradiction”, no solution.

pythagorean theorem
4^2 = 16
x^2 = 25, x = 5
√64 = 8
√1 = 1

right triangle 90°
a^2 + b^2 = c^2
hypotenuse 6, 8, 10