Question

Add: 3a – 5b + 7, 7b + 5a – 5
(b) Simplify the expression and find the value of x = -1; 7x + 3(x – 5)

Answer 1

Answer:

Step-by-step explanation:

(a) ( 3a - 5b + 7 ) + ( 7b + 5a - 5 )

    3a - 5b +7 + 7b + 5a - 5

    3a + 5a - 5b + 7b + 7 - 5

    8a + 2b + 2  {or if you wabt it to be more simplified then it is = 2(4a+b+1) }

(b) x = -1

    7x + 3( x-5 )

    7x + 3x - 15

    7(-1) + 3(-1) - 15

    -7 - 3 - 15

    -25