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10 lots of 4 can be calculated by multiplying 10 by 4. Therefore, 10 lots of 4 equals 40. This can be represented as 10 x 4 = 40.
First subtract 4-2, which equals 2. Then add 2+8=10.
3/10+2/53/10+4/10=7/10
A regular decagon; A 20-gon with 2 lots of 10 congruent sides and angles in an alternating pattern; A 30-gon with 3 lots of 10 congruent sides and angles in an 1-2-3-1-2-3 pattern; A 40-gon with 4 lots of 10 congruent sides and angles in an 1-2-3-4-1-2-3-4 pattern; etc.
2X - 4 = - 10 add 4 to each side 2X - 4 + 4 = - 10 + 4 2X = - 6 divide each side by 2 X = - 3 check in original equation 2(-3) - 4 = - 10 - 6 - 4 = - 10 - 10 = - 10 checks