0.3a+0.1b=1.3
4/3a+1/3b=6
First make the second problem into decmoals.
4.3a+.3b=6
Now move the 0.3a to the other side of the equal sign by subtracting
0.1b=1.3-0.3a
Now divide the 0.1 on both sides
b=13-3a
Now substitute the b in the second problem for 13-3a
4.3a+.3(13-3a)=6
Multiply the .3 with 13 and -3
4.3a+3.9-.9a=6
Subtract the 3.9 on both sides
4.3a-.9a=2.1
Subtract the 4.3a with the .9a
3.4a=2.1
Now divide 3.4 on both sides
a=.61
Now substitute the a in the first problem for .61
b=13-3(.61)
Multiply the -3 with .61
b=13-1.83
Now subtract 13 and 1.83
b=11.17
Now your answer is
a=.61
b=11.17
