Question

初一一元一次不等式、因式分解、一元一次、二元一次方程、化简求值计算题

Answer 1

x-5≤15 x≤20 x^+2xy+y^

x-6≤15 x≤21 x^+4xy+2y^

x-7≤15 x≤22 x^-y^

x-5≤15＋9 x≤29 3 x^+6xy+3y^

x-5≤15-x x≤10 2x^+4xy+y^

x-6≤15-2x x≤7 x^-2xy+y^

x-5=15 x+y=5 x-y=6

x-6=15 x+y=5 x-2y=6

x-7=15 x+5y=15 x-y=26

x-5=15＋9 3x+2y= 5 x-y=6

x-5=15-x x+4y=5 x-y=6

x-6=15-2x x+y=5 2x-3y=6