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4x-7=x+8
4w-19=w+2
8m-90=75-7m
3(2m-5)=9
4w+2(w-5)
5(2x+8)=6x+32
4 answers
x=5, w=7, m=165, m=-1, 6w-10, x=-4
thank you Ejda. this is my first visit to this site so im just figuring this all out. im interested not only in the answers but how to come up with them .I didn't quite understand your first explanation.
4x-7=x+8
move unknowns to one side and numbers to other. Change signs when switching sides.
4x-x = 8+7
combine terms.
3x = 15
divide both sides by 3
3x/3 = 15/3
x = 5
The others are done the same way.
move unknowns to one side and numbers to other. Change signs when switching sides.
4x-x = 8+7
combine terms.
3x = 15
divide both sides by 3
3x/3 = 15/3
x = 5
The others are done the same way.