Question

11. If 40% of 70 is x more than 30% of 80, then find x.​

Answer 1

Answer:

4

Step-by-step explanation:

40÷100×70=x+30÷100×80

28=x+24

x=28-24

x=4

Answer 2

Answer:

x + 40y = 70 eq 1, x + 40y = 80 eq

by using elimination method

2( x +40y = 70 ) , 2( x +30 y = 80)

2x +80y = 140 , 2x + 60y = 160

2x + 80y = 140

2x + 60y = 160

-. -. -

0 + 20y = -20

y = - 1 sub y value in eq 1 or 2

X + 40( -1) = 70

X - 40 = 70

X = 110