Muscle that used to thrust shoulder anteriorly (protraction), as when pushing something .

The serratus anterior muscle is used for protaction, that occurs while pushing something.

Explanation:

The serratus anterior muscle is the muscle that originates from the outer surface of the 8 or 9 ribs and inserts into the medial margin of the scapula.

The function of this muscle is to pull the scapula or shoulder muscle forward around the rib cage. Therefore, it is largely responsible for the protraction of the scapula, that occurs while pushing something.

Also, the serratus anterior rotates the scapula upwards, that occurs while lifting something overhead.

x = -6.5

explanation:

with this editor, you should be careful to put what you mean. 5/(2x - 7) = 3/(4x +14) is the way i will interpret it. cross multiply

5*(4x + 14) = 3*(2x - 7)       remove the brackets

20x + 70 = 6x - 21             add 21 to both sides

20x+ 70+21= 6x                 combine

20x + 91 = 6x                     subtract 20x

20x-20x+91=6x-20x           combine

91 = - 14x

x = - 91/14

x = - 6.5

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