Question

(157-9*x)/10+987=1000

Answer 1

(157-9*х)/10+987=1000
(157-9*х)/10=1000-987
(157-9*х)/10=13
(157-9*х)=13*10
157-9х=130
9х=150-130
9х=20
х=20:9
х=2,22
(157-9*2,22)/10+987=1000

(157-19,98)/10+987=1000
137,02/10+987=1000
13,702+987=1000
1000=1000