Question

61-x=25 35=5x-5 3x-1=5x+7 2x-5=7x+25 4x-3=8x+9 3.(x+1)+x=15​

Answer 1

Răspuns:

61-x=25=>-x=25-65=>-x=-40/×(-1)=>x=40

35=5x-5=>-5x=-5-35=>-5x=-40=>x=-40÷(-5)=>x=8

3x-1=5x+7=>3x-5x=7+1=]-2x=8=>x=8÷(-2)=>x=(-4)

2x-5=7x+25=>2x-7x=25+5=>-5x=30=>x=30÷(-5)=>x=(-6) ; 4x-3=8x+9=>4x-8x=9+3=>-4x=12=>x=12÷(-4)=>x=(-3); (x+1)+x=15=>x+1+x=15=>2x=15-1=>2x=14=>x=14÷2=>x=7

Answer 2

Explicație pas cu pas:

-x=25-61 => -x= -36 =>x=36

35=5x-5 => -5x = -5-35 => -5x= -40 => x= 8

3x-1=5x+7=>3x-5x=7+1 =>-2x=8 =>x= -4

2x-5=7x+25 => 2x-7x=25+5 => -5x=30 => x= -6

3(x+1)+x=15=> 3x+3+x=15 => 4x=15-3 => x=3