(x + 2) (x + 5) = 54
Solve the equation x (x + 54) = 1 / 19
19x=x+54
18x=54
x=3
10 x + 15 x = 1 to solve the equation
X of 10 + X of 15 = 1
Multiply both sides of the equation by 30
3x+2x=30
5x=30
x=6
Solution equation: 1 / 15 + 1 / x = 1 / 10
1/x=1/10-1/15
1/x=3/30-2/30=1/30
x=30