720-t*6= 60*9
720-t*6=540
720-t=540/6
720-t=90
t=720-90
b) 4*(250/a+12)=68
250/a+12=68/4
250/a+12=17
250/a=17-12
250/a=5
a=250/5
a=50
=630
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
720-6t=60*9
720-6t=540
6t=720-540
6t=180
t=180:6
t=30
.............................
4*(250:а+12)=68
250:а+12=68:4
250:а+12=17
250:а=17-12
250:а=5
а=250:5
а=50
720-t*6= 60*9
720-t*6=540
720-t=540/6
720-t=90
t=720-90
b) 4*(250/a+12)=68
250/a+12=68/4
250/a+12=17
250/a=17-12
250/a=5
a=250/5
a=50
=630