Question

2×-4=0
4(×-5)+7=×-19​

Answer 1

Raspuns:

x=2;x=-2

Explicație pas cu pas:

2x-4=0

2x=4

x=2

____________

4(x-5)+7=x-19

4x-13=x-19

4x-x-13=-19

4x-x=-19+13

3x=-19+13

3x=-6

x=-2

Answer 2

Explicație pas cu pas:

2x-4=0

2x=4-0

2x=4

x=4:2

x=2

4(x-5)+7=x-19

4x-20+7=x-19

4x-13=x-19

4x-x-13=-19

4x-x=-19+13

3x=-6

x=-6:3

x=-2