I need help very fast please !

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.

Find an equation of the line that has intercepts (1,0) and (0,4).