Which equation can you use to find the value of x 3x + 78 + x - 2 = 180

3x = 78 + x-2

78 = x-2

3x = 78

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Determine if the equation defines y as a function of x: 2xy = 1. yes o no