Following order of operations, multiplication happens first and addition happens second.
-5(-8s-3)+2(5s+4)
=40s+15+10s+8
=50s+23
50s+23 cannot be added as they are not like terms. Like terms need to have the same variables.
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-4 plus 4 equals zero.
4 + 8x
It is 10w + 4.
It is 14x+4 simplified
2x + x + 4 +2x = x + 20 5x + 4 = x + 20 5x - x = 20 - 4 4x = 16 x = 4