<span>y-2x=-6 and 5x-y=9
step 1: isolate y in the first equation
y = 2x - 6
step 2: substitute the y value on the 2th equation:
5x-(2x-6)=9
step 3: solve the present equation:
5x - 2x + 6 = 9
3x = 9-6
3x = 3
x = 1
step 4: get the y value by replacing the value of x in </span>y = 2x - 6:
<span>
y = 2*1 - 6
y = 2 - 6
y = -4
S={1, -4}
</span>
The hour has stayed the same. 36-22 is 14. That's 14 minutes between.
The ratio would be 75:45 so there would be 75 waters and 45 sodas
1 figure = $17 so you multiply 4 and 17 to get 68
Martin will need to save $68
