Solve the linear equation: 3.4 + 2(9.7 – 4.8x) = 61.2 what are the possible steps involved in solving this equation? check all that apply.

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)