a) 10 + x = 23 .12
10 + x = 276
x = 276 -10
x=266
b) 23 - x= 34 :2
23-x=17
x = 23-17
x = 6
a) 10+x=23.12
<=>10+x=276
=>x=276-10
=>x=266
b) 23-x=34:2
<=>23-x=17
=>x=23-17
=>x=6
a) 10 + x = 23.12
10 + x = 276
x = 276 -10
x = 266
b) 23 - x = 34 : 2
23 - x = 17
x = 23 -17
x = 6