Four times a first number is 1. the first number increased by twice the second number is - 20

First number is x

second is y

4x=1

x+2y=-20

solve for x first

4x=1

divide by 4

x=1/4=0.25

sub

x+2y=-20

0.25+2y=-20

minus 0.25 from both sides

2y=-20.25

divide both sides by 2

y=-10.125

the first number is 0.25 the second is - 10.125

or, in fraction form

the first number is 1/4 and the second is - 10 and 1/8