I need help solving systems of linear equations by substitution.
The problem is
{4x-3=5
-8x+6y=-10

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)