Answer:
x = 7
Step-by-step explanation:
Given
5x - 1 - 2x = 20, that is
3x - 1 = 20 ( add 1 to both sides )
3x = 21 ( divide both sides by 3 )
5x-1-2x=20
3x-1=20
3x=20+1
3x=21
3x/3=21/3
x=7
-------- hope it helped
