Toán a)-5(2-x)+4(x-3)=10x-15 b)7(x-9)-5(6-x)=-6+11x 11/10/2021 By Margaret a)-5(2-x)+4(x-3)=10x-15 b)7(x-9)-5(6-x)=-6+11x
Đáp án: \(a)\,-5(2-x)+4(x-3)=10x-15\\\Rightarrow-10+5x+4x-12=10x-15\\\Rightarrow9x-10x=-15+22\\\Rightarrow-x=7\\\Rightarrow x=-7\\b)\,7(x-9)-5(6-x)=-6+11x\\\Rightarrow7x-63-30+5x=-6+11x\\\Rightarrow7x+5x-11x=-6+63+30\\\Rightarrow x=87\) Trả lời
Đáp án:
Giải thích các bước giải:
nhớ cho 5 sao và ctlhn nhaa
Đáp án:
\(a)\,-5(2-x)+4(x-3)=10x-15\\\Rightarrow-10+5x+4x-12=10x-15\\\Rightarrow9x-10x=-15+22\\\Rightarrow-x=7\\\Rightarrow x=-7\\b)\,7(x-9)-5(6-x)=-6+11x\\\Rightarrow7x-63-30+5x=-6+11x\\\Rightarrow7x+5x-11x=-6+63+30\\\Rightarrow x=87\)