Toán Lớp 1: 2 * (x + 1) + 3 x 5 + 20 chia 4 = 30
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Toán Lớp 1: 2 * (x + 1) + 3 x 5 + 20 chia 4 = 30
Comments ( 2 )
2x + 2 + 15 + 5 = 30
2x + 22 = 30
2x = 30 – 22
2x = 8
x = 4