x+26.3=94
x=94-26.3
x=63.7
x÷4.5=5.6
x=4.5×5.6
x=25.2
5x-8.4=56.1
5x=56.1+8.4
x=64.5÷5
x=12.8
3x-15×4=348
3x=348+60
x=408÷3
x=136