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1 x – 7 = 12 +7 x = +7 2 2x + 3 = 17 2x = ÷2 –3 x = ÷2 –3 3 4x – 5 = 23 +5 4x = ÷4 x = ÷4 +5 4 -10 10 – 2x = 2 –2x = ÷ −2 x = –10 ÷ −2 5 4(x + 3) = 36 4x + 4x = –12 ÷4 x = = 36 –12 ÷4 6 2(x - 4) = 14 2x - 2x = ÷2 +8 x = = 14 ÷2 +8 7 2(x + 3) + 3(x – 1) = 23 2x + + 3x – 5x + 5x = ÷5 –3 x = = 23 = 23 ÷5 –3 |