Answer:
(5, -2)
Step-by-step explanation:
Use substitution
Y=5x-27 Put this equation into the place of y in the second one.
2x+3y=4
2x + 3(5x - 27) = 4 then solve for x
2x + 15x - 81 = 4
17x - 81 = 4
17x = 85
x = 5
Then put the value of x back into one of the equations and solve for y
y = 5(5) - 27
y = 25 - 27
y = -2
Suppose that Carol has x 10p coins in her purse. Since she has three times as many 20p coins as 10p coins, then she has 3x 20p coins in her purse.
x coins of 10p value $0.10x and 3x coins of 20p value $0.60x.
In total this amount of money is $(0.10x+0.60x)=$0.70x that is exactly $4.20. Thus, you get the equation
0.70x=4.20.
Solve it:

Carol has 6 coins of 10p and 3·6=18 coins of 20p.
Step-by-step explanation:
If you mean g(x) =-x-2 the answer is:
g(-3)=-(-3)-2
g(-3)=+3-2
g(-3)=+1
14.4/10=1.44
1.44/9=0.16
hope this helps