Question

pls answer the questions ​

Answer 1

is it the subject of maths then I don't know

Answer 2

Step-by-step explanation:

$1. \\ 7x = 35 \\ x = \frac{35}{7} \\ x = 5 \\ 15x = 15 \times 5 \\ = 75$

$2. \\ let \: all \: angles \: of \: quadrilateral \: be \: \\ 7x \: ,8x \:, 9x \: and \: 12x \\ 7x + 8x + 9x + 12x = 360 \\ 36x = 360 \\ x = \frac{360}{36} \\ x = 10 \\ all \: angles \: of \: quadrilateral \: = \\ 7x = 7 \times 10 = 70 \\ 8x = 8 \times 10 = 80 \\ 9x = 9 \times 10 = 90 \\ 12x = 12 \times 10 = 120$

I will request you to ask one by one question not in one time