Question

Example 1. If a = 2 and b = 5, the value of the
expression
2a - [3a + 4b - (2a - b) + 5a} -7b) is:​

Answer 1

Step-by-step explanation:

2*2-[3*2+4*5-(2*2-5)+5*2}-7*5

=4-[6+20-(4-5)+10}-35

=4-[26+1+10}-35

=4-[37}-35

=4-37-35

=-68

hope it helps you

Answer 2

Answer:

(-46)

Step-by-step explanation:

2a - [3a + 4b - (2a - b) + 5a} -7b)

2×2 - [3×2+4×5 -(2×2 - 5)+5×2} - 7×5)

4 - [6+20 - (4-5)+10} - 35)

4 - 26 +1+10-35

-46

-46 is your answer