Step-by-step explanation:
To give you a hand for this question, I will show you how to work out one of the equations
One equation is 
We know that when x = -2, y = 6
So we can substitute in -2 and see if we get 6





So this equation is true! Now try the same for the other equations :)
Answer:
x=15
Step-by-step explanation:
6x+15=7x
15=x
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Answer:
No solution
Step-by-step explanation:
by criss cross method, 6(x+3) = 6(4+x)
6x+18 = 24+6x
6x-6x = 24-18
0=6 no solution
Answer:
Water = 1/5 of the volume of the syrup
Step-by-.step explanation:
Suppose we had 1000 cm^3 of syrup and the new volume after adding water is x cm^3. Now the amount of sugar stays the same so we have the equation 35 * 1000 = 25 * x
x = (30 * 1000) / 25 = 30,000 / 25
= 1200 cm^3
So we need to add 200 cm^2 of water .
In general terms, we need to add water which equals 1/5 of the volume of the syrup,