Find x and round it to the nearest tenth is necessary, help please and thank you so much

Three times the sum of a number and seven is negative thirty-six. what is the number?

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation

3x + 4y = 5 x- 3y = -7 solve by substitution