11 (a) Factorise.5x-15..[1](b)Solve.4(3x-2)=28---[3](c)Simplify.(4a)/b*(3b^2)/(2a^2)[2](d) On the number line, show the inequality x≤3.4 3-i1034[1](e) Solve.7x3x+6---[2](f) Solve these simultaneous equations.x+y=5x-y=7r=y=...[2] 相关知识点: ...