Question 1107781
See if you can stay in one variable
1993=x
1994=x+0.19
1195=x+0.19+0.77
x+x+0.19+x+0.96=11.59
3x+1.15=11.59
3x=10.44
x=3.48 billion
x+0.19=3.67 billion
x+0.19+0.77=4.44 billion
they add to 11.59 billion