Math
posted by Lewis .
1.)A picture 8 in. by 12 in. is placed in a frame which has a uniform width. if the area of the frame is equal to the area of the picture, find the dimension of the frame
2.)Arman has 1160 annual income from bonds bearing 3% and 5 % interest. then he added 25% more of the 3% bonds and 40% more of the 5 % bonds, thereby increasing his annual income by 410. find his initial investment in each type of bond
i have a couple of problems like these,please helpshow me the formulas and solutions to these so i can study how it's done
thank YOU so much

1.)
width= 8+2x
length= 12 + 2x
(8+2x)(12+2x)96=96
now simplify