Answer:
Sum: 23 + 11 = 34
Difference: 23 - 11 = 12
Step-by-step explanation:
x + y = 34
x - y = 12
x = 12 + y
12 + y + y = 34
12 + 2y = 34
2y = 22
y = 11
x + 11 = 34
X = 23
23 and 11
23-11=12
and
23+11=34
-5 × -5 × -5
-5^3 = -5 × -5 × -5
2$+(1.29$ x 30)=40.70$