a) 2x>9-5 (we will move 5 to the other side)
2x>4 (Divide both sides with 2)
X>2
b) 8x-3<21
8x<21+3 (we will move 3 to the other side)
8x<24 (Divide both sides with 8)
c<3
c) 2(x+5)<7 ( multiply 2 with x and 5)
2x+10<7 ( we will move 10 to the other side)
2x<7-10
2x<-3 (we will divide 2 with both sides)
x<-3/2