3x+4y=10 and 4x+5y=8 i can't figure it out will someone

19.side- angle- side

20. angle- side- angle

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:

236 cm 16 time 12 = 192

6 times 7 = 42

192+42