Answer:

6.(i)x = -23/5

6.(ii)y = -1

Step-by-step explanation:

6.(i) 3x+5/2x+7 = 4

=>3x+5 = 4(2x+7)

=>3x+5 = 8x+28

=>8x-3x = 3-28

=> 5x = -23

=>x = -23/5

Check

LHS = 3x+5/2x+7 = [{(3*-23/5)+5}/{2*-23/5+7}] = [{(-69/5+5)/(-46/5+7)}] = [{(-44/5)/(-11/5)}] = [{(-44/5)*(5/-11)}] = 4 = RHS

6.(ii) 2y+5/y+4 = 1

=>2y+5 = y+4

=>2y-y = 4-5

=>y = -1

Check

LHS = 2y+5/y+4 = (2*-1+5)/(-1+4) = (-2+5)/3 = 3/3 = 1 = RHS