решите уравнения a) 9.5x-(3.2x+1.8x)+3.75=6.9 б) 11.3y-(9.7y-0.8y)+7.4=17 срочно по действиям

спасибо

а) 9.5x-(3.2x+1.8x)+3.75=6.9     9.5x-5x+3.75=6.9    4.5x+3.75=6.9    4.5x=6.9-3.75    4.5x=3.75    x=0.7б) 11.3y-(9.7y-0.8y)+7.4=17     11.3y-8.9y+7.4=17      2.4y+7.4=17      2.4y=17-7.4      2.4y=9.6      y=4

9.5х-(3.2х+1.8х)+3.75=6.99.5х-5х+3.75=6.94.5х+3.75=6.94.5х=6.9-3.754.5х=3.15х=3.15:4.5х=0.711.3у-(9.7у-0.8у)+7.4=1711.3у-8.9у+7.4=172.4у+7.4=172.4у=17-7.42.4у=9.6у=9.6:2.4у=4