( 12- х )*6.5=23.4 153+0.625у=215.5

Question

( 12- х )*6.5=23.4 153+0.625у=215.5

Answer 1

(12-х)*6.5=23.4
12-х=23.4/6.5
12-х=3.6
х=12-3.6
х=8.4
(12-8.4))*6.5=23.4
12-8.4=3.6
3.6=3.6


153+0.625 у=215.5
0.625 у=215.5-153
0.625 у=62.5
у=62.5/0.625
у=100
153+0.625*100=215.5
153+62.5=215.5
215.5=215.5