Simplify the expressions and find the value if x is equal to 2
(i) x + 7 + 4(x-5)
(ii) 3(x+2) + 5x-7
(iii) 6x + 5(x-2)
(iv) 4(2x-1) + 3x +11
(i) x + 7 + 4(x - 5)
= x + 7 + 4x - 20
= x + 4x + 7 - 20
= 5x - 13
Put x = 2
= 5(2) - 13
= 10 - 13
= -3
(ii)3(x+2) + 5x - 7
= 3x + 6 + 5x - 7
= 3x + 5x + 6 - 7
= 8x - 1
Put x = 2
= 8(2) - 1
= 16 - 1
= 15
(iii) 6x + 5(x - 2)
= 6x + 5x - 10
= 11x - 10
Put x = 2
= 11(2) - 10
= 22 - 10
= 12
(iv) 4(2x - 1) + 3x + 11
= 8x - 4 + 3x + 11
= 8x + 3x -4 + 11
= 11x + 7
Put x = 2
=11(2) + 7
= 22 + 7
= 29