1)
13×4-72:2=52-16=36
96:4×3-48:2×2=24×3:48:2×2=72-48:2×2=72-48=24
924-5×(45:3+7×24)=924-5×(15+168)=924-5×183=924-915=9
2)
214+x=5003
x=5003-214=4789
823-x=597
-x=597-823=-226
x=226
x-198=5718
x=5718+198=5916
x×5=85
5x=85
[tex]x = \frac{85}{5} = 17 [/tex]
x:8=165
x=165×8=1320
90:x=9
90=9x
[tex] \frac{90}{9} = x [/tex]
10=x
x=10