2x + 42 = 102 +26
2x + 42 = 128
2x = 128 - 42
x = 86 : 2
x = 43
2x + 42 = 102 + 26
2x + 42 = 128
2x = 128 - 42
2x = 86
x = 43
2x+42=102+26
2x+42=128
2x =128-42
2x =86
x =86:2
x =43
2x + 42 = 102 + 26
2x = 138
x = 138 : 2
x = 69
Vậy x = 69
2x + 42 = 102 + 26
2x + 42 = 128
2x = 128 - 42
2x = 86
x = 86 : 2
x = 43
2x + 42 = 102 + 26
2x + 42 = 128
2x = 128 - 42
2x = 86
x = 86 : 2
x = 43
\(2x+42=102+26\)
\(2x+42=128\)
\(2x=128-42\)
\(2x=86\)
\(x=86:2\)
\(x=43\)
2x+42=102+26
2x+42=128
2x=128-42
2x=86
x=86:2
x=43
2x+42=102+26
2x+42=128
2x=128-42
2x=86
x=86:2
x=43
2x + 42 = 102 + 26
2x + 42 = 128
2x = 128 - 42
2x = 86
x = 86 : 2
x = 43
2x+42=102+26
2x+42=128
2x=128-42
2x=84
x=84:2
x=42
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