7y
3
−7x
+4−5+6−3x
+6x
253 x 2,60
(0.361)2
(-13+54÷3)×(-8)-161÷(-7)
(7-13)×2+(-6-15)÷7
43,560 square feet divide by 1300
-18÷6-35÷(-7)+(-11)
2{4 [7 + 4 (5 · 3 − 9)] − 3 (40 − 8)}
x+y+3z=20
7x+3y+2z=46
9x+5y+8z=70
7-3i/6-2i
