Can some pls help me . Thank You !

x = -4

Step-by-step explanation:

First we multiply 3 by 4x and 1. We will get 12x and 3. The equation should then look like this: -79 = 7x + 12x -3.

Second, consolidate. 7x + 12x = 19x. Your equation should then look like this -79 = 19x - 3.

Third, add 3 to both sides. Your equation should then look like this. -76 = 19x.

Lastly, divide both sides by 19. You should get an answer of -4 = x.

Step-by-step explanation:

3x+2(5x-3)=7

the answer to that is: x = 1

-79= 7x+3(4x-1)

the answer to that is: x = - 4

9-4(2x-1)= 45

the answer to that is: x= -4

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.