Someone help please and try give me the working out for all of them or one of them if u give working out for the questions i will give a BRAINLIEST

1.
[tex]4x + 5x = 900 \\ 9x = 900 \\ x = 100[/tex]
Ratio = 400 : 500

2.
[tex]3x + 7x = 1000 \\ 10x = 1000 \\ x = 100[/tex]
Ratio = 300 : 700

3.
[tex]3x + 5x = 200 \\ 8x = 200 \\ x = 25[/tex]
Ratio = 75 : 125

4.
[tex]7x + 8x = 600 \\ 15x = 600 \\ x = 40[/tex]
Ratio = 280 : 320

13.
[tex]7x + 3x + 2x = 120 \\ 12x = 120 \\ x = 10[/tex]
Ratio = 70 : 30 : 20

14.
[tex]5x + 6x + 7x = 450 \\ 18x = 450 \\ x = 25[/tex]
Ratio = 125 : 150 : 175

15.
[tex]5x + 8x + 9x = 550 \\ 22x = 550 \\ x = 25[/tex]
Ratio = 125 : 200 : 225

16.
[tex]3x + 7x + 11x = 13.86 \\ 21x = 13.86 \\ x = 0.66[/tex]
Ratio = 1.98 : 4.62 : 7.26

Hope this helps. - M