The line through the 5 means regrouping also help please

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

Mrs.sling bought a pound of green beans for $1.80. how much will mrs.tennison pay for 3 1/2 pounds of green beans?

Find │7│. a. 1 over 7 b. –7 c. 7 asap i always mark brailiest who me so