11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2
20x + 5 - 20 = 21x + 4 -x = 4 + 15 x = -19
20
4x =20x=20/4x=5
20 + x = 55x = 55 -20x= 35
x2 + 20x +0 =30 [(20/2)2 =100] x2 + 20x + 100 =30 +100 √(x+10)2=√130 x+10=√130 x= −10+√130 √ means square root
It is the same as: 9+20x+20 = 20x+29
(20 * x) + 3 = 5 20 * x = 2 x = 1/10
280
(20 - x)/5
20
Set all numbers and variables equal to zero. (2x3)-(3x2)-(20x)-21=0 Next, follow the order of p.e.m.d.a.s. 6-6-20x-21=0 -20x-21=0 Separate the numbers and variables -20x=21 x= -21/20