5 kgs of sugar and 2 kgs of salt cost 150$.
4 kgs of sugar and 3 kgs of salt cost 162$.
How many does cost the kg of sugar and kg of salt?
How to solve it?
Thx..
2006-06-07 22:42:20 · 4 answers · asked by morena_shay 1 in Education & Reference ➔ Homework Help
set up a system of equations
5x+2y=150
4x+3y=162
just solve that by isolating one variable and substituting into the other equation, then plugging that answer in and solving for the other variable.
if you give up, the sugar costs $18 and the salt costs $30.
2006-06-07 22:51:07 · answer #1 · answered by donlockwood36 4 · 1⤊ 0⤋
Simple, simultaneous equations:
1) 5x + 2y = 150
2) 4x + 3y = 162
----------------------
Multiply Equation (1) by 3
Multiply Equation (2) by 2
Solve for x, then substitute x value into original equation (1). solve for y
you should get that 1kg sugar = $1, 1kg salt = $1
2006-06-08 05:52:14 · answer #2 · answered by conspicuous 5 · 0⤊ 0⤋
simple. use linear equation.
5x + 2y = 150....(1)
4x + 3y = 162.....(2)
work ur way from there. u'll get x=18 n y=30.
happy counting! =)
p/s:vote me the best answer. lol.
2006-06-08 05:53:41 · answer #3 · answered by vainybaby 3 · 0⤊ 0⤋
are you sure that the 4kgs of sugar and the 3kgs of salt dont cost 165??
2006-06-08 05:47:51 · answer #4 · answered by blubba_mush 2 · 0⤊ 0⤋