length and width are given in the ratio are ;(4:7) area of rectangle = (l×b) therefore, 4x×7x=700 28x^2=700 x^2=700/28 x^2=25 x=5 length =4x=4×5=20, lenght =20 and width =7x so, 7×5=35 width.....
So first you distribute the negative to the 6x and 13 which will flip the sign of both of them to -6x and -13 so take away the parentheses and the equation is now 7x-6x-13. You combine the x’s and you get 1x-13 or x-13
