1.( 12a+32b)÷2=
Solution: (12a+32b+28a)÷2 (copy the original text or write the original formula =)
=(40a+32b)÷2 (There must be a process)
=20a+ 16b
2. Solve the equation 5X+3=7x.
Solution:
5x+3=7x (copy the original)
3=7x-5x (there must be a step)
X= 1.2 (solution)
If there is no solution or root, it must be explained.
If it is a fractional equation, it needs to be tested.
Say X= has been tested. . . Is the solution of the original equation.