When x = 4 and y = 3, find the value of: a) 2x + 7y - 10
b) y(x - 2y)
c) (5y - 3x)/12
PLEASE HELP
PLEASEE​

a-8x+21y-10=19

b-3(x-6y)=6

c-(15-12)=4

Step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

56

step-by-step explanation: