23.5-(2.3a+1.2a)=19.3 И 12.98-(3.8X-1.3X)=11.23

Question

23.5-(2.3a+1.2a)=19.3 И 12.98-(3.8X-1.3X)=11.23

Answer 1

1) 4.2=3.5а, а=3.5/4.2
2) 1.75=2.5х, х=2.5/1.75