Maths real expo

3)
2x/1 – 2/5 y = 2y/1
LCM = 5‎
10x – 2y = 10y
10x = 10y + 2y
10x = 12y
X = 12y/10 ————-1
2x – 2/5y + 2 1/4x + 1/2y + 2y = 180
LCM = 20
40x – 8y + 45x + 10y + 40y = 3600
40x + 45x + 10y – 8y + 50y = 3600
95x + 42y = 3600
95 (6y/5) + 42y =3600
19(6y) + 42y = 3600
114y + 42y = 3600
156y = 3600
Y = 3600/156
Y = 23.08
Sub for y in eq 1
X = 6(23.08)/5
X = 27.69‎
ANSWER LOADING