Question

up Practice Exercise 7.3 1. If a = 2,b= c +4 and c = a -1, find the value of 7 (2a + 3c) -4b ​

Answer 1

Resposta:

29

Explicação passo a passo:

Se:

a=2

b=c+4

c=a-1

7*(2a+3c)-4b

7*[2*2 + 3*(a-1)] - 4*(c+4)

7*[4+3a-3] - 4c -16

7*[1+3a]-4c-16

7+21a-4c-16

7+(21*2)-4*(a-1)-16

7+42-4a+4-16

7+42-(4*2)+4-16

7+42-8+4-16

=29