4x+2x+2=3x-7 , i need with combining like terms because my 8th grade math teacher is making it harder than it is and show work by the way

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?