Answer:
a = 15
b = -14
Step-by-step explanation:
Here, we want to solve by elimination
let us start by rewriting the first equation
We can do this by multiplying through by 10
We have this as;
2a -5b = 100
Now let us eliminate
Multiply equation ii by 2 and equation i by 1
2a -5b = 100
2a-2b = 58
Subtract equation ii from i
-3b = 42
b = 42/-3 = -14
Secondly;
Multiply equation ii by 5 and i by 1
2a - 5b = 100
5a -5b = 145
Subtract ii from i
-3a = -45
a = 45/3
a = 15
