PLEASE HELP, very urgent. 50POINTS

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?